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    74 Products
    About Drill Bits
    industrial info icon

    Compare material, finish, length class, and decimal size equivalents.

    High-Speed Steel Drill Bits

    Image of Product. Front orientation. Drill Bits. High-Speed Steel Drill Bits, Jobbers' Length, Round Shank.
    Image of Product. Front orientation. Drill Bits. High-Speed Steel Drill Bits, Short Length, Round Shank.

    Jobbers' Length

    Round Shank

    Short Length

    Round Shank

    Image of Product. Front orientation. Drill Bits. High-Speed Steel Drill Bits, Maintenance Length, 3-Flat Shank, Round Shank.
    Image of Product. Front orientation. Drill Bits. High-Speed Steel Drill Bits, Extended Length, Round Shank.

    Maintenance Length

    Round Shank

    3-Flat Shank

    Extended Length

    Round Shank

    Image of Specification. Standard. Front orientation. Contains Border. Standard Point. For Metal.

    Standard

    Image of Specification. Split. Front orientation. Contains Border. Split Point. For Metal.

    Split

    Our basic drill bits are also the most versatile. Cut holes in a variety of metals, from the softest aluminum to the hardest steel.
    Jobbers' Length—These bits have the balance of rigidity and length needed for most applications.
    Short Length—The most rigid bits for drilling the straightest holes.
    Maintenance Length—Shorter than jobbers' length, these bits are more rigid for less wobble when drilling hard material. Also known as mechanics’ bits.
    Extended Length—Drill through panels and thick workpieces with our longest bits. Their length is good for creating deep holes but makes them less rigid than other bits. As a result, they are more prone to wobbling or breaking, especially when drilling hard materials.
    Black Oxide—The dark finish increases wear resistance and reduces friction to improve chip flow, so these bits can last 50% longer than uncoated bits.
    Titanium Nitride (TiN) Coated—Drill at higher speeds and last longer than uncoated and oxide-coated bits, especially on tough materials like hardened steel and nickel.
    Titanium Aluminum Nitride (TiAlN) Coated—The hardest and most wear-resistant coating, especially at high temperatures. These bits are best for hard and abrasive materials, such as iron and titanium.
    Gold Oxide—Like black oxide, this finish adds wear resistance and reduces friction for improved chip flow. Because it’s less prone to flaking off, it offers better rust protection when bits aren't in use.
    Uncoated—The most economical option, uncoated bits perform best when used on low-carbon steel and aluminum. Polished to reduce friction, they're also known as bright finish bits.
    Shank
    Drill Bit
    Size
    Decimal Size
    Equiv.
    Overall
    Lg.
    Max. Drilling
    Dp.
    Type
    Size
    Drill Bit
    Point Type
    Mfr.
    Pkg.
    Qty.
    Pkg.
    Jobbers' Length
     
    Black Oxide
    21/64"
    		0.3281"
    		4 5/8"2.82"Round
    		21/64"Split
    		Chicago-Latrobe12901A12900000
    21/64"
    		0.3281"
    		4 5/8"2.82"Round
    		21/64"Split
    		Chicago-Latrobe62901A58100000
     
    Titanium Nitride (TiN) Coated
    21/64"
    		0.3281"
    		4 5/8"2.82"Round
    		21/64"Split
    		Chicago-Latrobe129115A72900000
    21/64"
    		0.3281"
    		4 5/8"2.82"Round
    		21/64"Split
    		Chicago-Latrobe629115A82900000
     
    Titanium Aluminum Nitride (TiAlN) Coated
    21/64"
    		0.3281"
    		4 5/8"2.82"Round
    		21/64"Split
    		Chicago-Latrobe13202A6300000
     
    Uncoated
    21/64"
    		0.3281"
    		4 5/8"2.82"Round
    		21/64"Standard
    		Viking Norseman Drill18870A330000
    21/64"
    		0.3281"
    		4 5/8"2.82"Round
    		21/64"Standard
    		Viking Norseman Drill68870A13300000
     
    Short Length
     
    Black Oxide
    21/64"
    		0.3281"
    		3"1.19"Round
    		21/64"Split
    		Chicago-Latrobe12896A310000
    21/64"
    		0.3281"
    		3"1.19"Round
    		21/64"Split
    		Chicago-Latrobe62896A16900000
     
    Titanium Nitride (TiN) Coated
    21/64"
    		0.3281"
    		3"1.19"Round
    		21/64"Split
    		Viking Norseman Drill12908A4900000
    21/64"
    		0.3281"
    		3"1.19"Round
    		21/64"Split
    		Viking Norseman Drill32908A2500000
     
    Uncoated
    21/64"
    		0.3281"
    		3"1.19"Round
    		21/64"Standard
    		Chicago-Latrobe18947A1290000
     
    Maintenance Length
     
    Gold Oxide
    21/64"
    		0.3281"
    		4 1/8"2.48"Round/3-Flat
    		21/64"Split
    		Viking Norseman Drill187755A390000
    21/64"
    		0.3281"
    		4 1/8"2.48"Round/3-Flat
    		21/64"Split
    		Viking Norseman Drill687755A1900000
     
    Extended Length
     
    Black Oxide
    21/64"
    		0.3281"
    		6 1/2"3.63"Round
    		21/64"Standard
    		Chicago-Latrobe129315A14200000
    21/64"
    		0.3281"
    		8"5"Round
    		21/64"Standard
    		Chicago-Latrobe129515A4700000
     
    Titanium Nitride (TiN) Coated
    21/64"
    		0.3281"
    		6 1/2"4.13"Round
    		21/64"Standard
    		Dormer Pramet128965A74500000
     
    Uncoated
    21/64"
    		0.3281"
    		6 1/2"4.13"Round
    		21/64"Standard
    		Dormer Pramet12939A7700000
    21/64"
    		0.3281"
    		12"8.34"Round
    		21/64"Standard
    		Dormer Pramet12939A2500000
    21/64"
    		0.3281"
    		18"12.34"Round
    		21/64"Standard
    		Dormer Pramet12955A2100000
     

    Cobalt Steel Drill Bits

    Image of Product. Front orientation. Drill Bits. Cobalt Steel Drill Bits, Jobbers' Length, Round Shank.

    Jobbers' Length

    Round Shank

    Image of Product. Front orientation. Drill Bits. Cobalt Steel Drill Bits, Jobbers' Length, Morse Taper Shank.

    Jobbers' Length

    Morse Taper Shank

    Image of Product. Front orientation. Drill Bits. Cobalt Steel Drill Bits, Jobbers' Length, Hex Shank.

    Jobbers' Length

    Hex Shank

    Image of Product. Front orientation. Drill Bits. Cobalt Steel Drill Bits, Short Length, Round Shank.

    Short Length

    Round Shank

    Image of Product. Front orientation. Drill Bits. Cobalt Steel Drill Bits, Extended Length, Round Shank.

    Extended Length

    Round Shank

    Image of Specification. Split. Front orientation. Contains Border. Split Point. For Metal.

    Split

    Tough and wear resistant, cobalt steel bits last at least twice as long as high-speed steel. They can also run up to 25% faster at higher temperatures without being damaged on hard materials, such as nickel.
    Jobbers' Length—These bits have the balance of rigidity and length needed for most applications.
    Short Length—The most rigid bits for drilling the straightest holes.
    Extended Length—Drill through panels and thick workpieces with our longest bits. Their length is good for creating deep holes but makes them less rigid than other bits. As a result, they are more prone to wobbling or breaking, especially when drilling hard materials.
    Titanium Nitride (TiN) Coated—Drill at higher speeds and last longer than uncoated and oxide-coated bits, especially on tough materials like hardened steel and nickel.
    Titanium Aluminum Nitride (TiAlN) Coated—The hardest and most wear-resistant coating, especially at high temperatures. These bits are best for hard and abrasive materials, such as iron, titanium, and fiberglass.
    Uncoated—Polished to eject chips, these are also known as bright finish bits.
    Shank
    Each
    Package
    Drill Bit
    Size
    Decimal Size
    Equiv.
    Overall
    Lg.
    Max. Drilling
    Dp.
    Type
    Size
    Drill Bit
    Point Type
    Mfr.
    Each
    Pkg.
    Qty.
    Pkg.
    Jobbers' Length
     
    Titanium Nitride (TiN) Coated
    21/64"
    		0.3281"
    		4 5/8"3.31"Round
    		21/64"Split
    		Dormer Pramet27995A529000000————0
     
    Titanium Aluminum Nitride (TiAlN) Coated
    21/64"
    		0.3281"
    		4 5/8"2.46"Round
    		21/64"Split
    		Guhring2753A14200000————0
     
    Uncoated
    21/64"
    		0.3281"
    		4 5/8"2.30"Hex
    		21/64"Split
    		Cle-Line4909N2100000————0
    21/64"
    		0.3281"
    		4 5/8"2.8"Round
    		21/64"Split
    		Chicago-Latrobe3069A3100000————0
    21/64"
    		0.3281"
    		6 1/2"3.25"Morse Taper
    		Morse 1Split
    		Republic Drill3068A21200000————0
     
    Short Length
     
    Titanium Nitride (TiN) Coated
    21/64"
    		0.3281"
    		2 15/16"1.19"Round
    		21/64"Split
    		Chicago-Latrobe2416A2900000————0
     
    Uncoated
    21/64"
    		0.3281"
    		3"1.19"Round
    		21/64"Split
    		Chicago-Latrobe28765A2900000628765A147000000
     
    Extended Length
     
    Uncoated
    21/64"
    		0.3281"
    		6 1/2"3.46"Round
    		21/64"Split
    		Dormer Pramet3063A12900000————0
     

    Carbide Drill Bits

    Image of Product. Front orientation. Drill Bits. Carbide Drill Bits, Jobbers' Length, Round Shank.
    Image of Product. Front orientation. Drill Bits. Carbide Drill Bits, Short Length, Round Shank.

    Jobbers' Length

    Round Shank

    Short Length

    Round Shank

    The hardest and most wear-resistant drill bits you can buy. Carbide bits stay sharp at high temperatures and faster speeds for the best performance on hard and difficult-to-machine materials. They last 10 to 20 times longer than their closest alternative, cobalt steel. Carbide can be brittle, however, so these bits require a rigid machine tool holder to prevent breakage and should not be used in hand drilling applications.
    Jobbers' Length—These bits have the balance of rigidity and length needed for most applications.
    Short Length—The most rigid bits for drilling the straightest holes.
    Titanium Nitride (TiN) Coated—Drill at higher speeds and last longer than uncoated bits, especially on materials like hardened steel, iron, and stainless steel.
    Titanium Aluminum Nitride (TiAlN) Coated—No drill bits last longer. These are the best for high-speed, high-temperature drilling of very hard and abrasive materials, including titanium and fiberglass.
    Uncoated—Excellent for a range of materials but won't last as long as coated bits.
    Shank
    Drill Bit
    Size
    Decimal Size
    Equiv.
    Overall
    Lg.
    Max. Drilling
    Dp.
    Type
    Size
    Drill Bit Point
    Type
    Mfr.
    Each
    Jobbers' Length
     
    Titanium Nitride (TiN) Coated
    21/64"
    		0.3281"
    		4"2"Round
    		21/64"Four Facet
    		Ultra Tool27515A29000000
     
    Titanium Aluminum Nitride (TiAlN) Coated
    21/64"
    		0.3281"
    		4"2"Round
    		21/64"Four Facet
    		Ultra Tool8879A8600000
     
    Uncoated
    21/64"
    		0.3281"
    		4"2"Round
    		21/64"Four Facet
    		Ultra Tool2956A2900000
     
    Short Length
     
    Uncoated
    21/64"
    		0.3281"
    		2 3/4"1"Round
    		21/64"Four Facet
    		Ultra Tool2956A6900000
     

    Hex-Bit Tap Sets

    The taps in these sets have the same hex shank as screwdriver bits. Snap them into the included driver to thread a range of hole sizes. Then switch to a screwdriver bit to install the fastener. Taps have straight flutes that are good for most jobs.
    High-Speed Steel—Multiple Thread Size Sets
    Image of Product. Front orientation. Taps. Hex-Bit Tap Sets.
    The most versatile taps resist heat and wear to stay sharp. They’re good for most metals and plastic. These sets include multiple sizes of plug chamfer taps for through holes and blind holes.
    Uncoated—The economical choice, these won't last as long as coated taps.
    Plug Chamfer
    No. of
    Pieces
    Thread Size
    Thread
    Type
    Container
    Type
    No. of
    Flutes
    Shank
    Type
    Each
    Uncoated
    81 each of sizes M3 × 0.5 mm, M4 × 0.7 mm, M5 × 0.8 mm,
    M6 × 1.0 mm, M8 × 1.25 mm, and M10 × 1.5 mm    		Metric
    		Plastic Case4Hex3095N110000000
     

    Drill Bit Size Gauges

    Image of Product. Front orientation. Drill Bit Size Gauges. For Inch.

    For Inch

    Measure drill bit sizes with these gauges.
    For System of
    Measurement
    For Use
    With
    For Drill Bit Size
    Wd.
    Ht.
    Thk.
    Material
    Color
    Mounting
    Hole Dia.
    Each
    InchDrills1/16", 5/64", 3/32", 7/64", 1/8", 9/64", 5/32", 11/64", 3/16", 13/64", 7/32", 15/64", 1/4", 17/64", 9/32", 19/64", 5/16", 21/64", 11/32", 23/64", 3/8", 25/64", 13/32", 27/64", 7/16", 29/64", 15/32", 31/64", 1/2"2 1/2"6 1/2"5/64"Steel
    		Silver1/8"8986A67000000

    Drill Bit Guides

    Image of ProductInUse. Front orientation. Contains Annotated, MultipleImages. Drill Bit Guides. Drill Bit Guides.
    Image of Product. Front orientation. Drill Bit Guides. Drill Bit Guides.
    Place these guides on your workpiece to drill precise holes without building a fixture. They'll even work on corners and round surfaces. Lines marked on the side allow you to align your holes accurately. Made of hardened steel, they’re tough enough to withstand frequent use.
    For Drill Bit Size
    For Drill Bit Size Decimal Equiv.
    Lg.
    Wd.
    Ht.
    Material
    Each
    1/8", 9/64", 5/32", 11/64", 3/16", 13/64", 7/32", 15/64", 1/4", 17/64", 9/32", 19/64", 5/16", 21/64", 11/32", 23/64", 3/8"0.125", 0.1406", 0.1563", 0.1719", 0.1875", 0.2031", 0.2188", 0.2344", 0.25", 0.2656", 0.2813", 0.2969", 0.3125", 0.3281", 0.3438", 0.3594", 0.375"5 1/2"3/4"7/8"Steel
    		9550T14000000

    Carbide-Tipped Drill Bits

    Image of Product. Front orientation. Drill Bits. Carbide-Tipped Drill Bits, Jobbers' Length, Round Shank.

    Jobbers' Length

    Round Shank

    Image of Specification. Standard. Front orientation. Contains Border. Standard Point. For Metal.
    Image of Specification. Split. Front orientation. Contains Border. Split Point. For Metal.

    Standard

    Split

    Performance similar to solid carbide but at a lower price point. Like carbide bits, these are stronger than cobalt and high-speed steel and maintain their sharp edges when drilling abrasive material. However, when drilling tough metals like iron and hardened steel, upgrade to carbide for longer life.
    Jobbers' Length—These bits have the balance of rigidity and length needed for most applications.
    Shank
    Drill Bit
    Size
    Decimal Size
    Equiv.
    Overall
    Lg.
    Max. Drilling
    Dp.
    Type
    Size
    Drill Bit
    Point Type
    Mfr.
    Each
    Jobbers' Length
     
    Uncoated
    21/64"
    		0.3281"
    		4 5/8"2.8"Round
    		21/64"Standard
    		ICS2940A27000000
    21/64"
    		0.3281"
    		4 5/8"2.8"Round
    		21/64"Split
    		ICS31575A3500000
     

    Chip-Clearing High-Speed Steel Drill Bits

    Image of Product. Front orientation. Drill Bits. Chip-Clearing High-Speed Steel Drill Bits, Jobbers' Length, High Helix Flute, Round Shank.
    Image of Product. Front orientation. Drill Bits. Chip-Clearing High-Speed Steel Drill Bits, Jobbers' Length, Parabolic Flute, Round Shank.

    Jobbers' Length

    High Helix Flute

    Round Shank

    Jobbers' Length

    Parabolic Flute

    Round Shank

    Image of Product. Front orientation. Drill Bits. Chip-Clearing High-Speed Steel Drill Bits, Extended Length, Parabolic Flute, Round Shank.

    Extended Length

    Parabolic Flute

    Round Shank

    Image of Specification. Standard. Front orientation. Contains Border. Standard Point. For Metal.

    Standard

    Image of Specification. Split. Front orientation. Contains Border. Split Point. For Metal.

    Split

    With flutes that lift chips out of the hole, you don't have to stop drilling to clear these bits manually. They improve coolant flow to dissipate heat and prevent clogs that can damage the bit and ruin the hole. High-speed steel is good for general purpose drilling in most metals.
    High Helix Flute—Less aggressive than parabolic flutes for cleaner cuts in soft metals.
    Parabolic Flute—A U-shaped groove on the flutes cuts faster and clears chips more quickly than high-helix bits, so these are better for drilling deeper holes.
    Jobbers' Length—These bits have the balance of rigidity and length needed for most applications.
    Extended Length—Drill through panels and thick workpieces with our longest bits. Their length is good for creating deep holes but makes them less rigid than other bits. As a result, they are more prone to wobbling or breaking, especially when drilling hard materials.
    Black Oxide—The dark finish increases wear resistance and reduces friction to improve chip flow, so these bits can last 50% longer than uncoated bits.
    Titanium Nitride (TiN) Coated—Drill at higher speeds and last longer than uncoated and oxide-coated bits, especially on tough materials like hardened steel and nickel.
    Uncoated—The most economical option, uncoated bits perform best when used on low-carbon steel and aluminum. Polished to reduce friction, they're also known as bright finish bits.
    Shank
    Drill Bit
    Size
    Decimal Size
    Equiv.
    Overall
    Lg.
    Max. Drilling
    Dp.
    Flute
    Type
    Type
    Size
    Drill Bit
    Point Type
    Mfr.
    Each
    Jobbers' Length
     
    Black Oxide
    21/64"
    		0.3281"
    		4 5/8"2.28"High HelixRound
    		21/64"Split
    		Dormer Pramet31115A5900000
    21/64"
    		0.3281"
    		4 5/8"2.65"ParabolicRound
    		21/64"Split
    		Chicago-Latrobe29925A2900000
     
    Titanium Nitride (TiN) Coated
    21/64"
    		0.3281"
    		4 5/8"2.65"ParabolicRound
    		21/64"Split
    		Chicago-Latrobe29925A6900000
     
    Uncoated
    21/64"
    		0.3281"
    		4 5/8"2.65"ParabolicRound
    		21/64"Split
    		Dormer Pramet2754A5900000
    21/64"
    		0.3281"
    		4 5/8"2.82"High HelixRound
    		21/64"Standard
    		Chicago-Latrobe2912A12900000
     
    Extended Length
     
    Uncoated
    21/64"
    		0.3281"
    		8"5.34"ParabolicRound
    		21/64"Split
    		Dormer Pramet29745A4500000
    21/64"
    		0.3281"
    		12"8.34"ParabolicRound
    		21/64"Split
    		Dormer Pramet29745A7500000
     

    High-Speed Steel Drill Bits for Wire Installation

    Image of ProductInUse. Front orientation. Contains Annotated. Drill Bits. High-Speed Steel Drill Bits for Wire Installation.
    Feed electrical wire, data cables, and phone lines through walls with the same tool used to make the hole. Once you've drilled, insert wire through the bit's hollow shaft to the other side of the wall. These are simpler to use than flexible-shaft bits since you do not need to strip the end of the wire. Also known as bell hanger bits.
    Black Oxide—The dark finish increases wear resistance and reduces friction to improve chip flow, so these bits can last 50% longer than uncoated bits.
    Drill Bit
    Size
    Decimal Size
    Equiv.
    Overall
    Lg.
    Max. Drilling
    Dp.
    Shank
    Size
    Drill Bit
    Point Type
    Mfr.
    Each
    Black Oxide
     
    Round Shank
    21/64"
    		0.328"
    		18"3.31"5/16"Standard
    		RTJ Tool2934A46000000
    21/64"
    		0.328"
    		36"3.31"5/16"Standard
    		RTJ Tool2934A4800000
     

    Short-Flute High-Speed Steel Drill Bits

    Image of Product. Front orientation. Drill Bits. Short-Flute High-Speed Steel Drill Bits, Extended Length, Round Shank.

    Extended Length

    Round Shank

    Image of Specification. Split. Front orientation. Contains Border. Split Point. For Metal.

    Split

    The rigidity of short-length bits without sacrificing reach. The shallow drilling depth makes these less likely to wobble than other bits of the same length, so they stay centered and drill straighter. High-speed steel is good for general purpose drilling in most metals.
    Extended Length—Drill through panels and thick workpieces with our longest bits.
    Black Oxide—The dark finish increases wear resistance and reduces friction to improve chip flow, so these bits can last 50% longer than uncoated bits.
    Shank
    Drill Bit
    Size
    Decimal Size
    Equiv.
    Overall
    Lg.
    Max. Drilling
    Dp.
    Type
    Size
    Drill Bit
    Point Type
    Mfr.
    Each
    Extended Length
     
    Black Oxide
    21/64"
    		0.3281"
    		6"2.8"Round
    		21/64"Split
    		Chicago-Latrobe2986A31000000
    21/64"
    		0.3281"
    		12"2.8"Round
    		21/64"Split
    		Chicago-Latrobe2986A6500000
     

    High-Speed Steel Drill Bits for Plastic

    The precision-ground, 60° point penetrates gradually to prevent cracking and chipping. It also reduces heat that can deform the material. Use these bits for drilling into acrylic, laminate, and other plastics. They're made of wear-resistant high-speed steel.
    Jobbers' LengthAbout Jobbers' Length
    Image of Product. Front orientation. Drill Bits. High-Speed Steel Drill Bits for Plastic, Jobbers' Length.
    Shank
    Drill Bit
    Size
    Decimal Size
    Equiv.
    Overall
    Lg.
    Max. Drilling
    Dp.
    Type
    Size
    Point
    Angle
    Drill Bit
    Point Type
    Mfr.
    Each
    Uncoated
    21/64"
    		0.3281"
    		4 5/8"3.31"Round
    		21/64"60°Standard
    		Onsrud27465A59000000
     

    Carbide-Tipped Drill Bits for Wire Installation

    Image of ProductInUse. Front orientation. Contains Annotated. Drill Bits. Carbide-Tipped Drill Bits for Wire Installation.
    These bits are hard enough to drill through masonry and concrete as well as wood. Feed electrical wire, data cables, and phone lines through walls with the same tool used to make the hole. Once you've drilled, insert wire through the bit's hollow shaft to the other side of the wall. These are simpler to use than flexible-shaft bits since you do not need to strip the end of the wire. Also known as bell hanger bits.
    Black Oxide—The dark finish increases wear resistance and reduces friction to improve chip flow, so these bits can last 50% longer than uncoated bits.
    Drill Bit
    Size
    Decimal Size
    Equiv.
    Overall
    Lg.
    Max. Drilling
    Dp.
    Shank
    Size
    Drill Bit
    Point Type
    Mfr.
    Each
    Black Oxide/Carbide Tipped
     
    Round Shank
    21/64"
    		0.328"
    		18"4"5/16"Standard
    		RTJ Tool2934A43000000
    21/64"
    		0.328"
    		36"4"5/16"Standard
    		RTJ Tool2934A4500000
     

    Carbide Drill Bits for Carbon Fiber, Fiberglass, and Graphite

    Image of Product. Front orientation. Drill Bits. Carbide Drill Bits for Carbon Fiber, Fiberglass, and Graphite, Jobbers' Length.

    Jobbers' Length

    Cut clean holes in abrasive material without fraying or delaminating the surface. Made of carbide, these bits resist wear to retain a sharp edge, even after after hundreds of cuts.
    Shank
    Drill Bit
    Size
    Decimal Size
    Equiv.
    Overall
    Lg.
    Max. Drilling
    Dp.
    Type
    Size
    Point
    Angle
    Drill Bit
    Point Type
    Bit
    Style
    Mfr.
    Each
    Jobbers' Length
     
    Uncoated
    21/64"
    		0.3281"
    		4"2"Round
    		21/64"140°Brad
    		FlutedUltra Tool2828A19000000
     

    Carbide-Tipped Drill Bits for Hardened Steel

    Image of Product. Front orientation. Drill Bits. Carbide-Tipped Drill Bits for Hardened Steel, Jobbers' Length, Round Shank.

    Jobbers' Length

    Round Shank

    Straight flutes withstand the heavy pressure needed to penetrate hardened steel. These bits cut more aggressively and resist stress better than spiral-flute bits. A lower-priced alternative to solid carbide, they stay sharp when drilling abrasive material but won’t last as long.
    Jobbers' Length—These bits have the balance of rigidity and length needed for most applications.
    Shank
    Drill Bit
    Size
    Decimal Size
    Equiv.
    Overall
    Lg.
    Max. Drilling
    Dp.
    Type
    Size
    Drill Bit
    Point Type
    Mfr.
    Each
    Jobbers' Length
     
    Uncoated
    21/64"
    		0.3281"
    		4 3/4"1.31"Round
    		21/64"Notched
    		Izar2973A29000000
     

    Helical Threaded Insert Assortments with Installation Tools

    Image of Product. Front orientation. Threaded Inserts. Helical Threaded Insert Assortments with Installation Tools.
    Repair damaged threads or create new ones. These convenient assortments include helical inserts, an installation tool for each thread size, a drill bit, and a tap. The inserts are also known as Heli-Coil inserts.
    Pronged—The prong attaches to an installation tool for precise control as you drive inserts in. Remove the prong with a punch or break-off tool before inserting a screw.
    18-8 Stainless Steel—The choice for wet and outdoor environments, these inserts resist rust and mild chemicals.
    No. of Inserts
    Included
    Includes
    Thread
    Spacing
    Drill Bit Size
    For Max. Hole Dia.
    Each
    Pronged
     
    18-8 Stainless Steel
    18Drill Bit
    Installation Tool
    M8×1.25 mm Thread × 12 mm Installed Lg. (6 Each)
    M8×1.25 mm Thread × 16 mm Installed Lg. (6 Each)
    M8×1.25 mm Thread × 8 mm Installed Lg. (6 Each)
    Through-Hole Tap    		Coarse
    		21/64"
    		0.328"91732A951000000
    365/16"-18 Thread × 0.312" Installed Lg. (12 Each)
    5/16"-18 Thread × 0.469" Installed Lg. (12 Each)
    5/16"-18 Thread × 5/8" Installed Lg. (12 Each)
    Drill Bit
    Installation Tool
    Prong Break-Off Tool
    Through-Hole Tap    		Coarse
    		21/64"
    		0.328"91732A92500000
    365/16"-24 Thread × 0.312" Installed Lg. (12 Each)
    5/16"-24 Thread × 0.469" Installed Lg. (12 Each)
    5/16"-24 Thread × 5/8" Installed Lg. (12 Each)
    Drill Bit
    Installation Tool
    Prong Break-Off Tool
    Through-Hole Tap    		Fine
    		21/64"
    		0.328"91732A92700000
    48Drill Bits
    Installation Tools
    M5×0.8 mm Thread × 7.5 mm Installed Lg. (12 Each)
    M6×1 mm Thread × 9 mm Installed Lg. (12 Each)
    M8×1.25 mm Thread × 12 mm Installed Lg. (12 Each)
    M10×1.5 mm Thread × 15 mm Installed Lg. (12 Each)
    Through-Hole Taps    		Coarse
    		13/64"
    1/4"
    21/64"
    13/32"
    		0.203"
    0.250"
    0.328"
    0.406"    		90285A131000000
    541/4"-20 Thread × 3/8" Installed Lg. (12 Each)
    5/16"-18 Thread × 0.469" Installed Lg. (12 Each)
    3/8"-16 Thread × 0.562" Installed Lg. (12 Each)
    7/16"-14 Thread × 0.656" Installed Lg. (6 Each)
    1/2"-13 Thread × 3/4" Installed Lg. (6 Each)
    5/8"-11 Thread × 15/16" Installed Lg. (6 Each)
    Drill Bits
    Installation Tools
    Through-Hole Taps    		Coarse
    		17/64"
    21/64"
    25/64"
    29/64"
    17/32"
    21/32"
    		0.266"
    0.328"
    0.391"
    0.453"
    0.531"
    0.656"    		90285A121000000
    6010-32 Thread × 0.285" Installed Lg. (12 Each)
    1/4"-28 Thread × 3/8" Installed Lg. (12 Each)
    5/16"-24 Thread × 0.469" Installed Lg. (12 Each)
    3/8"-24 Thread × 0.562" Installed Lg. (12 Each)
    7/16"-20 Thread × 0.656" Installed Lg. (6 Each)
    1/2"-20 Thread × 3/4" Installed Lg. (6 Each)
    Drill Bits
    Installation Tools
    Through-Hole Taps    		Fine
    		13/64"
    17/64"
    21/64"
    25/64"
    29/64"
    33/64"
    		0.203"
    0.266"
    0.328"
    0.391"
    0.453"
    0.516"    		90285A124000000
     

    Short-Flute Cobalt Steel Drill Bits

    Image of Product. Front orientation. Drill Bits. Short-Flute Cobalt Steel Drill Bits, Jobbers' Length, Round Shank.

    Jobbers' Length

    Round Shank

    Image of Specification. Split. Front orientation. Contains Border. Split Point. For Metal.

    Split

    These bits combine the toughness and wear resistance of cobalt with short flutes for rigidity. The shallow drilling depth makes them less likely to wobble than other bits of the same length, so they stay centered and drill straighter. Cobalt lasts at least twice as long as high-speed steel. It can also run up to 25% faster at higher temperatures without damaging the bit on hard materials such as nickel.
    Jobbers' Length—These bits have the balance of rigidity and length needed for most applications.
    Black Oxide—The dark finish increases wear resistance and reduces friction to improve chip flow, so these bits can last 50% longer than uncoated bits.
    Shank
    Each
    Drill Bit
    Size
    Decimal Size
    Equiv.
    Overall
    Lg.
    Max. Drilling
    Dp.
    Type
    Size
    Drill Bit
    Point Type
    Mfr.
    1-4
    5-Up
    Jobbers' Length
     
    Black Oxide
    21/64"
    		0.3281"
    		4 5/8"1.2"Round
    		21/64"Split
    		Cleveland3146A131000000000000
     

    Short-Flute Carbide-Tipped Drill Bits

    Image of Product. Front orientation. Drill Bits. Short-Flute Carbide-Tipped Drill Bits, Extended Length, Round Shank.
    Image of Specification. Split. Front orientation. Contains Border. Split Point. For Metal.

    Extended Length

    Round Shank

    Split

    Our strongest short-flute bits, these have a carbide tip that stays sharp when drilling abrasive materials, such as titanium. The shallow drilling depth makes them less likely to wobble than other bits of the same length, so they stay centered and drill straighter.
    Extended Length—Drill through panels and thick workpieces with our longest bits.
    Shank
    Drill Bit
    Size
    Decimal Size
    Equiv.
    Overall
    Lg.
    Max. Drilling
    Dp.
    Type
    Size
    Drill Bit
    Point Type
    Mfr.
    Each
    Extended Length
     
    Uncoated
    21/64"
    		0.3281"
    		6"3.31"Round
    		21/64"Split
    		Rock River Tool2854A65000000
    21/64"
    		0.3281"
    		12"2.78"Round
    		21/64"Split
    		ICS2854A2400000
     

    Chip-Clearing Cobalt Steel Drill Bits

    Image of Product. Front orientation. Drill Bits. Chip-Clearing Cobalt Steel Drill Bits, Jobbers' Length, Parabolic Flute, Round Shank.

    Jobbers' Length

    Parabolic Flute

    Round Shank

    Image of Specification. Split. Front orientation. Contains Border. Split Point. For Metal.

    Split

    Avoid clogs and dissipate heat with cobalt bits that last at least twice as long as high-speed steel. The flutes clear chips to improve coolant flow and prevent damage to the bit and the hole. They also speed up drilling since you don't have to stop to clear the bit manually.
    Jobbers' Length—These bits have the balance of rigidity and length needed for most applications.
    Titanium Nitride (TiN) Coated—Drill at higher speeds and last longer than uncoated and oxide-coated bits, especially on tough materials like hardened steel and nickel.
    Uncoated—Polished to eject chips, these are also known as bright finish bits.
    Shank
    Drill Bit
    Size
    Decimal Size
    Equiv.
    Overall
    Lg.
    Max. Drilling
    Dp.
    Flute
    Type
    Type
    Size
    Drill Bit
    Point Type
    Mfr.
    Each
    Jobbers' Length
     
    Titanium Nitride (TiN) Coated
    21/64"
    		0.3281"
    		4 1/2"2.8"ParabolicRound
    		21/64"Split
    		Viking Norseman Drill3183A59000000
     
    Uncoated
    21/64"
    		0.3281"
    		4 1/2"2.8"ParabolicRound
    		21/64"Split
    		Viking Norseman Drill29925A92900000
     

    Chip-Clearing High-Speed Steel Drill Bits for Aluminum, Brass, and Bronze

    Image of Product. Front orientation. Drill Bits. Chip-Clearing High-Speed Steel Drill Bits for Aluminum, Brass, and Bronze, Jobbers' Length, Low Helix Flute, Round Shank.
    Image of Specification. Standard. Front orientation. Contains Border. Standard Point. For Metal.

    Jobbers' Length

    Low Helix Flute

    Round Shank

    Standard

    Designed for soft metals that can gum up other drill bits, wide flutes lift chips out of the hole. This prevents clogs that can weaken and damage the bit and ruin the hole. Also known as slow spiral bits, these are made of versatile high-speed steel.
    Jobbers' Length—These bits have the balance of rigidity and length needed for most applications.
    Uncoated—The most economical option, uncoated bits perform best when used on low-carbon steel and aluminum. Polished to reduce friction, they're also known as bright finish bits.
    Shank
    Each
    Drill Bit
    Size
    Decimal Size
    Equiv.
    Overall
    Lg.
    Max. Drilling
    Dp.
    Flute
    Type
    Type
    Size
    Drill Bit
    Point Type
    Mfr.
    1-5
    6-Up
    Jobbers' Length
     
    Uncoated
    21/64"
    		0.3281"
    		4 5/8"2.65"Low HelixRound
    		21/64"Standard
    		Chicago-Latrobe2928A229000000000000
     

    Depth-Limiting Drill Stops

    Image of ProductInUse. Front orientation. Drill Stops.
    Ensure identical hole depths every time. Position the collar on your bit and tighten the set screw.
    For Drill
    Bit Size
    For Drill Bit Size
    Decimal Equiv.
    Overall
    Lg.
    OD
    Hex Key Size
    for Set Screw
    Material
    Each
    For Inch Drill Bits
    21/64"0.3281"3/4"3/4"3/32"Steel
    		8865A20400000
     

    M2 High-Speed Tool Steel Rod Sets

    Image of Product. Front orientation. Steel. M2 High-Speed Tool Steel Rod Sets.
    Supplied in a metal index case with fold-out panels, these rods, also known as drill blanks, have an undersized diameter for machining your own jobbers'-length drill bits. They are hardened for increased abrasion and impact resistance. M2 tool steel offers a nice balance of wear resistance and machinability. It has a high molybdenum content, which allows it to maintain sharp cutting edges even at elevated temperatures.
    Includes
    No. of
    Pieces
    Dia.
    Tolerance
    Mechanical
    Finish
    Each
    Sizes 1/16"-1/2" (×1/64ths increments) and a metal index case29-0.0002" to 0"Precision Ground2952A50000000

    Tight-Tolerance Water-Hardening W1 Tool Steel Rods

    Image of Product. Front orientation. Steel. Tight-Tolerance Water-Hardening W1 Tool Steel Rods.
    Ready for turning in your lathe, these rods are precision ground and held to strict diameter and straightness tolerances. Also known as drill rod. With far less alloy content than other tool steel, W1 is the most machinable we offer. These rods are often used to make hammers, files, and reamers—tools that don't require the dimensional stability of A2 or O1. These rods are also decarb-free, which means any surface flaws created during the manufacturing process have been removed. This makes them even more machinable and leads to better results from heat treating or finishing. Heat treat the surface for extra wear resistance. Or, quench this steel in water to boost its hardness and strength, giving it a sharper, more durable edge for small tools.
    Material Certificate Icon
    Certificates with a traceable lot number are available for these products. Download certificates from ORDER HISTORY after your order ships.
    Dia.
    Dia. Tolerance
    Drill Bit
    Size
    Fabrication
    Heat
    Treatment
    Yield Strength,
    psi
    Mechanical
    Finish
    Hardness
    Max. Hardness After
    Heat Treatment
    Specs.
    Met
    3 ft.
    Long
    6 ft.
    Long
    0.3281"-0.001" to 0.001"21/64"
    		Hot RolledAnnealed50,000Precision GroundRockwell B95 (Medium)Rockwell C65ASTM A6868890K236000000000000

    Undersized Hardened Multipurpose M2 High-Speed Tool Steel Rods

    Image of Product. Front orientation. Steel. Undersized Hardened Multipurpose M2 High-Speed Tool Steel Rods.
    These rods, also known as drill blanks, have an undersized diameter for machining your own drill bits. They're hardened for increased abrasion and impact resistance. M2 tool steel offers a nice balance of wear resistance and machinability. It has a high molybdenum content, which allows it to maintain sharp cutting edges even at elevated temperatures.
    Material Certificate Icon
    Certificates with a traceable lot number are available for these products. Download certificates from ORDER HISTORY after your order ships.
    Dia.
    Dia.
    Tolerance
    Drill Bit
    Size
    Lg.
    Yield
    Strength
    Hardness
    Mechanical
    Finish
    Each
    0.3281"-0.0002" to 0"21/64"
    		4 5/8"Not RatedRockwell C60 (Extra Hard)Precision Ground3009A13300000

    Helical Threaded Inserts with Installation Tools

    Image of Product. Drill Bit, Installation Tool and Through-Hole Tap. Front orientation. Threaded Inserts. Helical Threaded Inserts with Installation Tools, Pronged, Drill Bit, Through-Hole Tap, Installation Tool.

    Drill Bit, Installation Tool

    and Through-Hole Tap

    Quickly restore stripped threads—these inserts come with through-hole taps and installation tools. The tough coils on these inserts expand once installed to anchor in a tapped hole.
    Pronged—The prong attaches to an installation tool for precise control as you drive inserts in. Remove the prong with a punch or break-off tool before inserting a screw.
    18-8 Stainless Steel—The choice for wet and outdoor environments, these inserts resist rust and mild chemicals.
    Thread
    Size
    Installed
    Lg.
    Drill Bit
    Size
    For Max.
    Hole Dia.
    No. of Inserts
    Included
    Includes
    Each
    Pronged
     
    18-8 Stainless Steel
    5/16"-24
    		0.312"21/64"
    		0.328"10Drill Bit
    Installation Tool
    Through-Hole Tap    		98356A135000000
    5/16"-24
    		0.469"21/64"
    		0.328"10Drill Bit
    Installation Tool
    Through-Hole Tap    		91732A92800000
    5/16"-24
    		0.625"21/64"
    		0.328"10Drill Bit
    Installation Tool
    Through-Hole Tap    		98356A13600000
     

    Left-Hand High-Speed Steel Drill Bits

    Image of Product. Side1 orientation. Drill Bits. Left-Hand High-Speed Steel Drill Bits, Jobbers' Length, Round Shank.
    Image of Specification. Split. Front orientation. Contains Border. Split Point. For Metal.

    Jobbers' Length

    Round Shank

    Split

    With flutes that spiral in the opposite direction of other bits, these are primarily used to remove stripped screws. Choose a bit that’s slightly smaller than the diameter of the screw’s head. Set your power tool to rotate in reverse. Slowly drill in the center of the screw head, maintaining constant pressure. As the bit penetrates, it will catch onto the screw and reverse it out of the hole. If the screw is badly stripped, you might need to punch a starter hole. Also known as reverse-flute bits. High-speed steel is the versatile choice for drilling most metals.
    Jobbers' Length—These bits have the balance of rigidity and length needed for most applications.
    Uncoated—The most economical option, uncoated bits perform best when used on low-carbon steel and aluminum. Polished to reduce friction, they're also known as bright finish bits.
    Shank
    Each
    Drill Bit
    Size
    Decimal Size
    Equiv.
    Overall
    Lg.
    Max. Drilling
    Dp.
    Type
    Size
    Drill Bit
    Point Type
    Mfr.
    1-5
    6-Up
    Jobbers' Length
     
    Uncoated
    21/64"
    		0.3281"
    		4 5/8"2.65"Round
    		21/64"Split
    		ICS2876A32100000000000
     
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