McMaster-Carr logo
    Filter by
    System of Measurement
    Drill Bit Size
    Attribute Image
    Shank Type
    Industrial Info Compare
    Decimal Size Equivalent
    Shank Size
    Attribute Image
    Flute Direction
    Sold As
    Number of Flutes
    U.S.–Mexico–Canada Agreement (USMCA) Qualifying
    DFARS Specialty Metals
    Export Control Classification Number (ECCN)
    Industrial Info Snippet
    Forward
    Enter e-mail addresses in the fields below
    Message
    Cancel
    Print
    How can we improve?
    Comments
    E-mail address (if you would like a response)
    67 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.
    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.
    Black/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.
    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
    17/64"
    		0.2656"
    		4 1/8"2.47"Round
    		17/64"Split
    		Chicago-Latrobe12901A12500000
    17/64"
    		0.2656"
    		4 1/8"2.47"Round
    		17/64"Split
    		Chicago-Latrobe122901A61700000
     
    Titanium Nitride (TiN) Coated
    17/64"
    		0.2656"
    		4 1/8"2.47"Round
    		17/64"Split
    		Chicago-Latrobe129115A7250000
    17/64"
    		0.2656"
    		4 1/8"2.47"Round
    		17/64"Split
    		Chicago-Latrobe1229115A82500000
     
    Titanium Aluminum Nitride (TiAlN) Coated
    17/64"
    		0.2656"
    		4 1/8"2.47"Round
    		17/64"Split
    		Chicago-Latrobe13202A5800000
     
    Uncoated
    17/64"
    		0.2656"
    		4 1/8"2.47"Round
    		17/64"Standard
    		Viking Norseman Drill18870A280000
    17/64"
    		0.2656"
    		4 1/8"2.47"Round
    		17/64"Standard
    		Viking Norseman Drill128870A12800000
     
    Short Length
     
    Black Oxide
    17/64"
    		0.2656"
    		2 5/8"1.03"Round
    		17/64"Split
    		Chicago-Latrobe12896A260000
    17/64"
    		0.2656"
    		2 5/8"1.03"Round
    		17/64"Split
    		Chicago-Latrobe122896A16500000
     
    Titanium Nitride (TiN) Coated
    17/64"
    		0.2656"
    		2 5/8"1.03"Round
    		17/64"Split
    		Viking Norseman Drill12908A450000
    17/64"
    		0.2656"
    		2 5/8"1.03"Round
    		17/64"Split
    		Viking Norseman Drill62908A2200000
     
    Uncoated
    17/64"
    		0.2656"
    		2 5/8"1.03"Round
    		17/64"Standard
    		Chicago-Latrobe18947A1250000
     
    Maintenance Length
     
    Black/Gold Oxide
    17/64"
    		0.2656"
    		3 5/8"2"Round/3-Flat
    		17/64"Split
    		Viking Norseman Drill187755A350000
    17/64"
    		0.2656"
    		3 5/8"2"Round/3-Flat
    		17/64"Split
    		Viking Norseman Drill1287755A1500000
     
    Extended Length
     
    Black Oxide
    17/64"
    		0.2656"
    		6 1/4"3.47"Round
    		17/64"Standard
    		Chicago-Latrobe129315A13400000
    17/64"
    		0.2656"
    		8"5.1"Round
    		17/64"Standard
    		Chicago-Latrobe129515A4500000
     
    Titanium Nitride (TiN) Coated
    17/64"
    		0.2656"
    		6 1/4"3.88"Round
    		17/64"Standard
    		Dormer Pramet128965A74100000
     
    Uncoated
    17/64"
    		0.2656"
    		6 1/4"3.88"Round
    		17/64"Standard
    		Dormer Pramet12939A7400000
    17/64"
    		0.2656"
    		12"8.46"Round
    		17/64"Standard
    		Dormer Pramet12939A2100000
    17/64"
    		0.2656"
    		18"12.46"Round
    		17/64"Standard
    		Dormer Pramet12955A1600000
     

    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, 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
    17/64"
    		0.2656"
    		4 1/8"2.88"Round
    		17/64"Split
    		Dormer Pramet27995A525000000————0
     
    Titanium Aluminum Nitride (TiAlN) Coated
    17/64"
    		0.2656"
    		4 1/4"2.32"Round
    		17/64"Split
    		Guhring2753A13700000————0
     
    Uncoated
    17/64"
    		0.2656"
    		4 1/8"1.92"Hex
    		17/64"Split
    		Cle-Line4909N160000————0
    17/64"
    		0.2656"
    		4 1/8"2.5"Round
    		17/64"Split
    		Chicago-Latrobe3069A260000————0
     
    Short Length
     
    Titanium Nitride (TiN) Coated
    17/64"
    		0.2656"
    		2 5/8"1.03"Round
    		17/64"Split
    		Chicago-Latrobe2416A2500000————0
     
    Uncoated
    17/64"
    		0.2656"
    		2 5/8"1.03"Round
    		17/64"Split
    		Chicago-Latrobe28765A2500001228765A145000000
     
    Extended Length
     
    Uncoated
    17/64"
    		0.2656"
    		6 1/4"3.34"Round
    		17/64"Split
    		Dormer Pramet3063A12500000————0
    17/64"
    		0.2656"
    		8"5.5"Round
    		17/64"Split
    		Republic Drill3168A1600000————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
    17/64"
    		0.2656"
    		3 1/2"1.7"Round
    		17/64"Four Facet
    		Ultra Tool27515A26000000
     
    Titanium Aluminum Nitride (TiAlN) Coated
    17/64"
    		0.2656"
    		3 1/2"1.7"Round
    		17/64"Four Facet
    		Ultra Tool8879A7600000
     
    Uncoated
    17/64"
    		0.2656"
    		3 1/2"1.7"Round
    		17/64"Four Facet
    		Ultra Tool2956A2500000
     
    Short Length
     
    Uncoated
    17/64"
    		0.2656"
    		2 1/2"0.8"Round
    		17/64"Four Facet
    		Ultra Tool2956A6700000
     

    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 Product. Front orientation. Drill Bits. Carbide-Tipped Drill Bits, Short Length, Round Shank.

    Short Length

    Round Shank

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

    Extended 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.
    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.
    Shank
    Drill Bit
    Size
    Decimal Size
    Equiv.
    Overall
    Lg.
    Max. Drilling
    Dp.
    Type
    Size
    Drill Bit
    Point Type
    Mfr.
    Each
    Jobbers' Length
     
    Uncoated
    17/64"
    		0.2656"
    		4 1/8"2.4"Round
    		17/64"Standard
    		ICS2940A23000000
    17/64"
    		0.2656"
    		4 1/8"2.4"Round
    		17/64"Split
    		ICS31575A1800000
     
    Short Length
     
    Uncoated
    17/64"
    		0.2656"
    		2 3/4"0.78"Round
    		17/64"Standard
    		Izar28805A22100000
    17/64"
    		0.2656"
    		2 3/4"0.78"Round
    		17/64"Split
    		Izar2750A2100000
     
    Extended Length
     
    Uncoated
    17/64"
    		0.2656"
    		6 1/4"3.34"Round
    		17/64"Standard
    		ICS29465A2100000
     

    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
    17/64"
    		0.2656"
    		4 1/8"2.34"ParabolicRound
    		17/64"Split
    		Chicago-Latrobe29925A25000000
    17/64"
    		0.2656"
    		4 1/4"2.18"High HelixRound
    		17/64"Split
    		Dormer Pramet31115A550000
     
    Titanium Nitride (TiN) Coated
    17/64"
    		0.2656"
    		4 1/8"2.34"ParabolicRound
    		17/64"Split
    		Chicago-Latrobe29925A6500000
     
    Uncoated
    17/64"
    		0.2656"
    		4 1/8"2.34"ParabolicRound
    		17/64"Split
    		Dormer Pramet2754A550000
    17/64"
    		0.2656"
    		4 1/8"2.47"High HelixRound
    		17/64"Standard
    		Chicago-Latrobe2912A1250000
     
    Extended Length
     
    Uncoated
    17/64"
    		0.2656"
    		8"5.46"ParabolicRound
    		17/64"Split
    		Dormer Pramet29745A4100000
    17/64"
    		0.2656"
    		12"8.46"ParabolicRound
    		17/64"Split
    		Dormer Pramet29745A7100000
     

    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
    17/64"
    		0.2656"
    		6"2.5"Round
    		17/64"Split
    		Chicago-Latrobe2986A26000000
    17/64"
    		0.2656"
    		12"2.5"Round
    		17/64"Split
    		Chicago-Latrobe2986A6100000
     

    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
    17/64"
    		0.2656"
    		4 1/8"2.88"Round
    		17/64"60°Standard
    		Onsrud27465A56000000
     

    Carbide Drill Bits for Hardened Steel

    Image of Product. Front orientation. Drill Bits. Carbide Drill Bits for Hardened Steel, Short Length, Round Shank.
    Image of Specification. Split. Front orientation. Contains Border. Split Point. For Metal.

    Short Length

    Round Shank

    Split

    The hardest and most wear-resistant bits with the longest life. Straight flutes withstand the heavy pressure needed to penetrate hardened steel. These bits cut more aggressively and resist stress better than spiral-flute bits. Carbide stays sharp at high temperatures and faster speeds for the best performance on hard and difficult-to-machine materials. It 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.
    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.
    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
    Short Length
     
    Titanium Nitride (TiN) Coated
    17/64"
    		0.2656"
    		2 1/2"0.8"Round
    		17/64"Split
    		Ultra Tool8882A25000000
     
    Uncoated
    17/64"
    		0.2656"
    		2 1/2"0.8"Round
    		17/64"Four Facet
    		Ultra Tool8944A2500000
     

    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
    17/64"
    		0.2656"
    		3 1/2"1.7"Round
    		17/64"140°Brad
    		FlutedUltra Tool2828A17000000
     

    Coolant-Fed Carbide Drill Bits

    Image of Product. Front orientation. Drill Bits. Coolant-Fed Carbide Drill Bits, Jobbers' Length, Round Shank.
    Image of Product. Side1 orientation. Drill Bits. Coolant-Fed Carbide Drill Bits, Maintenance Length, Round Shank.

    Jobbers' Length

    Round Shank

    Maintenance Length

    Round Shank

    The hardest and most wear-resistant bits, these deliver coolant to reduce heat and evacuate chips. They are designed for CNC machines that supply coolant through the spindle rather than an external source, such as a hose and nozzle. Coolant flows directly from holes in the bit's tip onto the drilling surface. This speeds up cuts and leads to excellent performance in deep holes and tough materials such as stainless steel and titanium.
    Jobbers' Length—These bits have the balance of rigidity and length needed for most applications.
    Maintenance Length—Shorter than jobbers' length, these bits are more rigid for less wobble when drilling hard material. Also known as mechanics’ bits.
    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.
    Shank
    Drill Bit
    Size
    Decimal Size
    Equiv.
    Overall
    Lg.
    Max. Drilling
    Dp.
    Type
    Size
    Drill Bit Point
    Type
    Mfr.
    Each
    Jobbers' Length
     
    Titanium Aluminum Nitride (TiAlN) Coated
    17/64"
    		0.2656"
    		3 1/2"1.69"Round
    		17/64"Four Facet
    		Garr Tool2396N948000000
     
    Maintenance Length
     
    Titanium Aluminum Nitride (TiAlN) Coated
    17/64"
    		0.2656"
    		2 15/16"1.34"Round
    		17/64"Four Facet
    		Garr Tool2396N97600000
     

    Precise-Cut High-Speed Steel Drill Bits

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

    Jobbers' Length

    Round Shank

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

    Standard

    Produce holes so precise that you don’t need to finish them with a reamer. The double-edged flutes keep these bits centered to drill straighter and smoother than other types, especially in hard metals and composites such as fiberglass. Also known as double-margin drill 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.
    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.
    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
    17/64"
    		0.2656"
    		4 1/8"2.87"Round
    		17/64"Standard
    		Republic Drill3021A32000000
     

    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
    17/64"
    		0.2656"
    		4 1/4"1.06"Round
    		17/64"Notched
    		Izar2973A25000000
     

    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.
    1-9
    10-Up
    Jobbers' Length
     
    Black Oxide
    17/64"
    		0.2656"
    		4 1/8"1.04"Round
    		17/64"Split
    		Cleveland3146A12600000000000
     

    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.
    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.
    Each
    Jobbers' Length
     
    Gold Oxide
    17/64"
    		0.2656"
    		4 1/8"2.75"Round
    		17/64"Split
    		ICS88055A66000000
     
    Uncoated
    17/64"
    		0.2656"
    		4 1/8"2.34"Round
    		17/64"Split
    		ICS2876A2710000
     

    Smooth-Finish Carbide Drill Bits

    Image of Product. Front orientation. Drill Bits. Smooth-Finish Carbide Drill Bits, Jobbers' Length, Round Shank.
    Image of Specification. Split. Front orientation. Contains Border. Split Point. For Metal.

    Jobbers' Length

    Round Shank

    Split

    With more cutting edges than other drill bits, these cut continuously and consistently for a smoother finish. They also stay centered to produce holes that are straighter and more accurate. However, since there’s less space between the cutting edges, they don’t clear chips as quickly. Made of carbide, these are the hardest and most wear-resistant drill bits you can buy. They stay sharp at high temperatures and faster speeds for the best performance on hard and difficult-to-machine materials. 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.
    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
     
    Uncoated
    17/64"
    		0.2656"
    		3 1/2"1.7"Round
    		17/64"Split
    		Ultra Tool3171A21000000
     

    Hole-Starting Carbide Drill Bits

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

    Short Length

    Round Shank

    Split

    Harder and more wear resistant than cobalt steel, these carbide bits create an accurate starting place in your workpiece. Cut an indent, then continue drilling with a longer bit. The indent prevents slipping so the final hole is centered and precise. Carbide stays sharp at high temperatures and faster speeds. It 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.
    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.
    Shank
    140° Point Angle
    Drill Bit
    Size
    Decimal Size
    Equiv.
    Overall
    Lg.
    Max. Drilling
    Dp.
    Type
    Size
    Drill Bit
    Point Type
    Mfr.
    Each
    Short Length
     
    Titanium Nitride (TiN) Coated
    17/64"
    		0.2656"
    		2 5/8"0.8"Round
    		17/64"Split
    		GWS88915A310000000
     

    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
    17/64"
    		0.2656"
    		6"2.88"Round
    		17/64"Split
    		Rock River Tool2854A61000000
    17/64"
    		0.2656"
    		12"2.41"Round
    		17/64"Split
    		ICS2854A1900000
     

    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
    17/64"
    		0.2656"
    		4 1/4"2.6"ParabolicRound
    		17/64"Split
    		Viking Norseman Drill3183A55000000
     
    Uncoated
    17/64"
    		0.2656"
    		4 1/4"2.6"ParabolicRound
    		17/64"Split
    		Viking Norseman Drill29925A92500000
     

    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.
    1-11
    12-Up
    Jobbers' Length
     
    Uncoated
    17/64"
    		0.2656"
    		4 1/8"2.34"Low HelixRound
    		17/64"Standard
    		Chicago-Latrobe2928A22500000000000
     

    Extensions for Round-Shank Drill Bits

    Image of Product. Front orientation. Contains Annotated. Drill Bit Extensions. Extensions for Round-Shank Drill Bits, Two-Piece Extensions.

    Two-Piece Extensions

    Attach to the shank of a drill bit to extend its reach.
    Two-Piece Extensions—To attach two-piece extensions, insert a drill bit into the collet, then thread the collet onto the extension and tighten with a wrench.
    For Drill Bit
    Size
    Size Decimal
    Equiv.
    Shank
    Size
    Shank
    Size
    Overall
    Lg.
    OD
    Material
    Each
    For Inch Drill Bits
     
    Two-Piece Extensions
    17/64"0.2656"17/64"3/8"4 1/2"9/16"Steel
    		3016A833000000
    17/64"0.2656"17/64"3/8"9 1/2"9/16"Steel
    		3016A85900000
     
    back to top