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    39 Products
    About Drill Bits
    industrial info icon

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

    Cobalt Steel Drill Bit Sets

    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' LengthAbout Jobbers' Length
    Image of Product. Front orientation. Drill Bits. Cobalt Steel Drill Bit Sets, Jobbers' Length.
    Image of Specification. Split. Front orientation. Contains Border. Split Point. For Metal.

    Split

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

    Standard

    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.
    No. of
    Pieces
    Drill Bit Sizes Included
    System of Measurement
    Drill Bit Point
    Style
    Mil. Spec.
    Container
    Type
    Mfr.
    Each
    Titanium Nitride (TiN) Coated
    131/16"-1/4" (increments of 1/64")InchSplit Point
    		NAS907 Type JMetal CaseChicago-Latrobe28115A710000000
    151/16"-1/2" (increments of 1/32")InchSplit Point
    		NAS907 Type JMetal CaseChicago-Latrobe28115A74000000
    211/16"-3/8" (increments of 1/64")InchSplit Point
    		NAS907 Type JMetal CaseChicago-Latrobe28115A72000000
    291/16"-1/2" (increments of 1/64")InchSplit Point
    		NAS907 Type JMetal CaseChicago-Latrobe28115A77000000
     
    Uncoated
    131.0 mm and 1.5 mm,
    2.0-7.0 mm (increments of 0.5 mm)    		MetricSplit Point
    		NAS907 Type JMetal CaseViking Norseman Drill27945A2400000
    131/16"-1/4" (increments of 1/64")InchSplit Point
    		NAS907 Type JMetal CaseChicago-Latrobe8856A5100000
    151/16"-1/2" (increments of 1/32")InchSplit Point
    		NAS907 Type JMetal CaseChicago-Latrobe8856A53000000
    191.0 mm and 1.5 mm,
    2.0-10.0 mm (increments of 0.5 mm)    		MetricSplit Point
    		NAS907 Type JMetal CaseViking Norseman Drill27945A25000000
    2080-61 gaWire GaugeStandard Point
    		NAS907 Type JMetal CaseChicago-Latrobe8856A5700000
    211/16"-3/8" (increments of 1/64")InchSplit Point
    		NAS907 Type JMetal CaseViking Norseman Drill8856A56000000
    251.0 mm and 1.5 mm,
    2.0-13.0 mm (increments of 0.5 mm)    		MetricSplit Point
    		NAS907 Type JMetal CaseViking Norseman Drill27945A27000000
    26A-ZLetter SizeSplit Point
    		NAS907 Type JMetal CaseDormer Pramet8856A55000000
    291/16"-1/2" (increments of 1/64")InchSplit Point
    		NAS907 Type JMetal CaseChicago-Latrobe8856A52000000
    416.0-10.0 mm (increments of 0.1 mm)MetricSplit Point
    		NAS907 Type JMetal CaseViking Norseman Drill27945A28000000
    6060-53 ga,
    52-1 ga    		Wire GaugeStandard
    Split    		NAS907 Type JMetal CaseChicago-Latrobe8856A54000000
    1141/16"-1/2" (increments of 1/64"),
    1.0-13.0 mm (increments of 0.5 mm),
    60-1 ga    		Inch, Metric, Wire GaugeSplit Point
    		NAS907 Type JMetal CaseDormer Pramet3048A4700000000
    1151/16"-1/2" (increments of 1/64"),
    60-53 ga,
    52-1 ga,
    A-Z,    		Inch, Wire Gauge, Letter SizeSplit
    Standard    		NAS907 Type JMetal CaseChicago-Latrobe3048A4600000000
     
    Short LengthAbout Short Length
    Image of Product. Front orientation. Drill Bits. Cobalt Steel Drill Bit Sets, Short Length.
    Image of Specification. Split. Front orientation. Contains Border. Split Point. For Metal.

    Split

    The most rigid bits for drilling the straightest holes.
    Uncoated—Polished to eject chips, these are also known as bright finish bits.
    No. of
    Pieces
    Drill Bit Sizes Included
    System of
    Measurement
    Drill Bit Point
    Style
    Container
    Type
    Mfr.
    Each
    Uncoated
    151/16"-1/2" (increments of 1/32")InchSplit Point
    		Metal CaseChicago-Latrobe3148A620000000
    26A-ZLetter SizeSplit Point
    		Metal CaseDormer Pramet3148A76000000
    291/16"-1/2" (increments of 1/64")InchSplit Point
    		Metal CaseDormer Pramet3148A68000000
    6060-53 ga,
    52-1 ga    		Wire GaugeStandard
    Split    		Metal CaseDormer Pramet3148A72000000
     

    Short-Flute Cobalt Steel Drill Bit Sets

    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' LengthAbout Jobbers' Length
    Image of Product. Front orientation. Drill Bits. Short-Flute Cobalt Steel Drill Bit Sets, Jobbers' Length.
    Image of Specification. Split. Front orientation. Contains Border. Split Point. For Metal.

    Split

    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.
    No. of
    Pieces
    Drill Bit Sizes Included
    System of
    Measurement
    Drill Bit Point
    Style
    Mil. Spec.
    Container
    Type
    Mfr.
    Each
    Black Oxide
    291/16"-1/2" (increments of 1/64")InchSplit Point
    		NAS907 Type DMetal CaseCleveland87875A240000000
     

    Cobalt Steel Reduced-Round Shank Drill Bit Sets

    More wear resistant than high-speed steel, these bits cut large holes with tools that have a standard-size chuck. The shank has a smaller diameter than the cutting tip and fits drill presses and portable drills. 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. Also known as Silver and Deming bits.
    Jobbers' LengthAbout Jobbers' Length
    Image of Product. Front orientation. Drill Bits. Cobalt Steel Reduced-Round Shank Drill Bit Sets, Jobbers' Length.
    Image of Specification. Split. Front orientation. Contains Border. Split Point. For Metal.

    Split

    These bits have the balance of rigidity and length needed for most applications.
    Uncoated—Polished to eject chips, these are also known as bright finish bits.
    Shank
    Size
    No. of
    Pieces
    Drill Bit Sizes Included
    System of
    Measurement
    Drill Bit Point
    Style
    Container
    Type
    Mfr.
    Each
    Uncoated
    1/2"89/16"-1" (increments of 1/16")InchSplit Point
    		Metal CaseChicago-Latrobe8939A310000000
     

    Tap and Drill Bit Sets

    Image of Product. Front orientation. Tap and Drill Bit Sets. Tap and Drill Bit Sets, Metal Case.

    Metal Case

    Drill and tap a variety of hole sizes. These taps and drill bits are for use on metal and plastic.
    Uncoated Cobalt Steel Tap—Uncoated cobalt steel taps have higher strength and wear resistance than carbon steel and high-speed steel taps.
    Plug Chamfer—Plug-chamfer taps are a versatile choice for most tapping applications. With 3-5 chamfered cutting threads, they require moderate torque and are often used for start-to-finish tapping of through holes and closed-end holes. However, they do not start threads as easily as taper chamfers. When using them to tap closed-end holes, be sure to leave sufficient space at the bottom for chips to accumulate.
    Uncoated Cobalt Steel Drill Bit—Uncoated cobalt steel drill bits have higher strength and wear resistance than carbon steel and high-speed steel drill bits.
    No. of
    Pieces
    Chamfer
    Type
    Tap Sizes
    Included
    Overall Lg.
    Thread
    Type
    No. of
    Flutes
    Pitch Dia.
    Limit
    Drill Bit Sizes
    Included
    Drill Bit Material
    Container
    Type
    Mfr.
    Each
    Uncoated Cobalt Steel Tap
    18Plug1 each of sizes:
    6-32
    8-32
    10-24
    10-32
    1/4-20
    5/16-18
    3/8-16
    7/16-14
    1/2-13    		2"
    2 1/8"
    2 3/8"
    2 1/2"
    2 23/32"
    2 15/16"
    3 5/32"
    3 3/8"    		UNC, UNF
    		2, 3H327/64"
    5/16"
    36 ga.
    29 ga.
    25 ga.
    21 ga.
    7 ga.
    F
    U    		Uncoated Cobalt SteelMetal CaseRepublic Drill2610A130000000
     

    Center Drill Sets

    Image of Product. Front orientation. Center Drills. Center Drill Sets.
    A variety of sizes to create precisely centered holes that mate with lathe centers or to drill and countersink in a single step to install fasteners.
    Cobalt Steel—Tough and wear resistant, these center drills last at least twice as long as high-speed steel. They can also run up to 25% faster at higher temperatures without chipping on hard materials, such as nickel.
    60° Countersink Angle—The most common center drill angle. The short and sturdy tip starts holes that perfectly match lathe centers.
    Uncoated—Suitable for most tasks, but won't last as long as coated center drills.
    60°
    Countersink Angle
    No. of
    Pieces
    Trade Size
    Finish
    Container
    Type
    Mfr.
    Each
    Cobalt Steel
    51, 2, 3, 4, 5UncoatedPlastic CaseDormer Pramet2917A5000000
     

    Reamer Sets

    Keep a variety of reamer sizes on hand for finishing holes.
    Round Shank
    Image of Product. Front orientation. Reamers. Reamer Sets, Round Shank.
    These reamers fit in the chuck of drill presses, turret lathes, and other machine and power tools, making them the most common shank type.
    Straight Flute—The most common flute style, these reamers are suitable for a wide range of applications, but not recommended for holes with a keyway or other breaks in the surface.
    Spiral Flute—Since these reamers clear chips better than straight flutes, they leave holes with a smoother finish. They're better for holes with breaks in the surface, such as a keyway, because they cut continuously across the breaks instead of moving in and out.
    Oversized Fractional—Oversized reamers are larger than the fraction by 0.001" in diameter to create a looser fit than standard sizes. They're typically used in holes where objects such as pins need to stay in place, but still can be easily removed.
    Undersized Fractional—Undersized reamers are smaller than the fraction by 0.001" in diameter to create a tighter fit than standard sizes. They're typically used to press-fit a pin, bearing, or other object into a hole.
    Cobalt Steel—With better heat and wear resistance than high-speed steel, these reamers run up to 25% faster, last longer, and perform better on hard materials, such as cast iron, hardened steel, titanium, and stainless steel.
    Right-Hand Spiral—These reamers pull chips upward as they cut, so they're often used in blind holes.
    Sizes Included
    No. of
    Pieces
    Material
    Spiral
    Direction
    Container
    Type
    For Use On
    Mfr.
    Each
    Straight Flute
     
    Oversized/Undersized Fractional Inch
    0.126"-0.501" (Seven Oversized Reamers), 0.124"-0.499" (Seven Undersized Reamers)14Cobalt Steel
    		—Wood CaseAluminum, Brass, Bronze, Iron, Nickel, Plastic, Stainless Steel, Steel, Titanium, Tool Steel, Hardened SteelYankee3087A240000000
     
    Spiral Flute
     
    Oversized/Undersized Fractional Inch
    0.126"-0.501" (Seven Oversized Reamers), 0.124"-0.499" (Seven Undersized Reamers)14Cobalt Steel
    		Right HandWood CaseAluminum, Brass, Bronze, Iron, Nickel, Plastic, Stainless Steel, Steel, Titanium, Tool Steel, Hardened SteelYankee3087A25000000
     

    Reamer Sets for Dowel-Pin Holes

    Finish holes to match standard fractional dowel pin sizes. These sets include two reamers for each size within the range listed. One reamer is slightly below the size while the other is slightly above the size, so you can choose how snug your dowel pin will fit in the hole.
    Round Shank
    Image of Product. Front orientation. Reamers. Reamer Sets for Dowel-Pin Holes, Round Shank.
    These reamers fit in the chuck of drill presses, turret lathes, and other machine and power tools, making them the most common shank type.
    Straight Flute—The most common flute style, these reamers are suitable for a wide range of applications, but not recommended for holes with a keyway or other breaks in the surface.
    Cobalt Steel—With better heat and wear resistance than high-speed steel, these reamers run up to 25% faster, last longer, and perform better on hard materials, such as cast iron, hardened steel, titanium, and stainless steel.
    Sizes Included
    No. of
    Pieces
    Material
    Container
    Type
    For Use On
    Mfr.
    Each
    Straight Flute
     
    Inch
    1/8"-1/2" (Increments of 1/16", 2 of each)14Cobalt Steel
    		Metal CaseAluminum, Brass, Bronze, Iron, Nickel, Plastic, Stainless Steel, Steel, Titanium, Tool Steel, Hardened SteelYankee3002A790000000
     

    Fluteless Smooth-Finish Countersink Sets for Rivets

    Image of Product. Front orientation. Countersinks. Fluteless Smooth-Finish Countersink Sets for Rivets.
    With a hollow body and single cutting edge, these countersinks make less contact with the hole than solid-body countersinks. The reduced friction minimizes vibration and leaves a more accurate, tight-fitting recess for your screw head.
    Cobalt Steel—Tough and wear resistant, these countersinks last at least twice as long as high-speed steel. They can also run up to 25% faster at higher temperatures without chipping on hard materials, such as nickel.
    For Hole Dia.
    100°
    Countersink Angle
    No. of
    Flutes
    No. of
    Pieces
    1/4" Shank
    5/16"
    Shank
    3/8"
    Shank
    Finish
    Shank
    Type
    Container Type
    Mfr.
    Each
    Cobalt Steel
    045/16", 3/8"1/2"5/8"UncoatedRoundPlastic-Container CaseKeo2739A17000000
     

    Fluteless Smooth-Finish Countersink Sets for Screws

    Image of Product. Front orientation. Countersinks. Fluteless Smooth-Finish Countersink Sets for Screws.
    With a hollow body and single cutting edge, these countersinks make less contact with the hole than solid-body countersinks. The reduced friction minimizes vibration and leaves a more accurate, tight-fitting recess for your screw head.
    Cobalt Steel—Tough and wear resistant, these countersinks last at least twice as long as high-speed steel. They can also run up to 25% faster at higher temperatures without chipping on hard materials, such as nickel.
    Titanium Nitride (TiN) Coated—Withstand heat, corrosion, and abrasion better than uncoated and black oxide countersinks, so they stay sharp over longer periods.
    For Hole Dia.
    82°
    Countersink Angle
    90°
    Countersink Angle
    No. of
    Flutes
    No. of
    Pieces
    1/4" Shank
    5/16"
    Shank
    3/8"
    Shank
    Finish
    Shank
    Type
    Container
    Type
    Mfr.
    Each
    Each
    Cobalt Steel
    045/16", 3/8"1/2"5/8"UncoatedRoundPlastic CaseKeo2739A220000002739A24000000
    045/16", 3/8"1/2"5/8"Titanium Nitride (TiN) CoatedRoundPlastic CaseKeo2739A230000002739A25000000
     

    Countersink Sets for Rivets

    Image of Product. Front orientation. Countersinks. Countersink Sets for Rivets.
    Cut cone-shaped recesses for rivets of various diameters so the head sits flush with the surface.
    Cobalt Steel—Tough and wear resistant, these countersinks last at least twice as long as high-speed steel. They can also run up to 25% faster at higher temperatures without chipping on hard materials, such as nickel.
    Number of Flutes—Countersinks with fewer flutes are best for aggressive cutting. They leave more room for chips to clear, reducing friction and heat. Countersinks with more flutes spread the cut across more edges for better stability, a smoother finish, and longer tool life.
    100°
    Countersink Angle
    120°
    Countersink Angle
    No. of
    Flutes
    Body Dia. Included
    No. of
    Pieces
    Finish
    Shank
    Type
    Container
    Type
    Mfr.
    Each
    Each
    Cobalt Steel
    11/4", 3/8", 1/2", 3/4", 1"5UncoatedRoundPlastic CaseKeo11187N11000000011187N140000000
    31/4", 3/8", 1/2", 3/4", 1"5UncoatedRoundPlastic CaseKeo11187N1200000011187N15000000
    61/4", 5/16", 3/8", 1/2", 5/8", 3/4", 1"7UncoatedRoundPlastic CaseKeo11187N1300000011187N16000000
     
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