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    60 Products
    About Drill Bits
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    Compare material, finish, length class, and decimal size equivalents.

    High-Speed Steel Step Drill Bits

    Image of Product. Front orientation. Drill Bits. High-Speed Steel Step Drill Bits.
    Image of Specification. Standard. Front orientation. Contains Border. Standard Point. For Metal.

    Standard

    Drill multiple hole sizes using only one bit. These have steps with progressively larger diameters—the deeper they drill, the bigger the hole. Count the steps as you drill to achieve the proper size. These bits also deburr as they cut, so they're good for thin materials like sheet metal and plastic panels. Wear and heat resistant, high-speed steel is versatile for use on a range of 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.
    Shank
    Drill Bit Size
    Decimal Size Equiv.
    Overall
    Lg.
    Type
    Size
    Drill Bit
    Point Type
    Each
     
    Black Oxide
    1/8", 5/32", 3/16", 7/32", 1/4", 9/32", 5/16", 11/32", 3/8", 13/32", 7/16", 15/32", 1/2"
    0.125", 0.1563", 0.1875", 0.2188", 0.25", 0.2813", 0.3125", 0.3438", 0.375", 0.4063", 0.4375", 0.4688", 0.5"
    3 1/8"Round/3-Flat
    1/4"Standard
    5910N11000000
    3/16", 1/4", 5/16", 3/8", 7/16", 1/2", 9/16", 5/8", 11/16", 3/4", 13/16", 7/8"
    0.1875", 0.25", 0.3125", 0.375", 0.4375", 0.5", 0.5625", 0.625", 0.6875", 0.75", 0.8125", 0.875"
    3"Round/3-Flat
    3/8"Standard
    5910N1400000
    3/16", 1/4", 5/16", 3/8", 7/16", 1/2"
    0.1875", 0.25", 0.3125", 0.375", 0.4375", 0.5"
    3 1/8"Round/3-Flat
    1/4"Standard
    5910N1200000
    1/4", 5/16", 3/8", 7/16", 1/2", 9/16", 5/8", 11/16", 3/4"
    0.25", 0.3125", 0.375", 0.4375", 0.5", 0.5625", 0.625", 0.6875", 0.75"
    2 5/8"Round/3-Flat
    3/8"Standard
    5910N1300000
    1/4", 3/8", 1/2", 5/8", 3/4", 7/8", 1", 1 1/8", 1 1/4", 1 3/8"
    0.25", 0.375", 0.5", 0.625", 0.75", 0.875", 1", 1.125", 1.25", 1.375"
    3 1/8"Round/3-Flat
    3/8"Standard
    5910N15000000
    3/8", 1/2"
    0.375", 0.5"
    2"Round/3-Flat
    1/4"Standard
    5910N1600000
    1/2", 9/16", 5/8", 11/16", 3/4", 13/16", 7/8", 15/16", 1"
    0.5", 0.5625", 0.625", 0.6875", 0.75", 0.8125", 0.875", 0.9375", 1"
    3 1/4"Round/3-Flat
    1/2"Standard
    5910N1700000
    7/8", 1", 1 1/8", 1 1/4", 1 3/8"
    0.875", 1", 1.125", 1.25", 1.375"
    3"Round/3-Flat
    3/8"Standard
    5910N18000000
    4.0 mm, 5.0 mm, 6.0 mm, 6.5 mm, 8.0 mm, 9.0 mm, 10.0 mm, 11.0 mm, 12.0 mm0.1575", 0.1969", 0.2362", 0.2559", 0.315", 0.3543", 0.3937", 0.4331", 0.4724"
    65 mmRound/3-Flat
    6.4 mmStandard
    5910N1900000
    4.0 mm, 6.0 mm, 8.0 mm, 10.0 mm, 12.0 mm, 14.0 mm, 16.0 mm, 18.0 mm, 20.0 mm0.1575", 0.2362", 0.315", 0.3937", 0.4724", 0.5512", 0.6299", 0.7087", 0.7874"
    65 mmRound/3-Flat
    6.4 mmStandard
    5910N2100000
    6.0 mm, 8.0 mm, 10.0 mm, 12.0 mm, 14.0 mm, 16.0 mm, 18.0 mm, 20.0 mm, 22.0 mm, 24.0 mm, 26.0 mm, 28.0 mm, 30.0 mm, 32.0 mm0.2362", 0.315", 0.3937", 0.4724", 0.5512", 0.6299", 0.7087", 0.7874", 0.8661", 0.9449", 1.0236", 1.1024", 1.1811", 1.2598", 1.378"
    89 mmRound/3-Flat
    9.53 mmStandard
    5910N22000000
     
    Titanium Nitride (TiN) Coated
    1/8", 5/32", 3/16", 7/32", 1/4", 9/32", 5/16", 11/32", 3/8", 13/32", 7/16", 15/32", 1/2"
    0.125", 0.1563", 0.1875", 0.2188", 0.25", 0.2813", 0.3125", 0.3438", 0.375", 0.4063", 0.4375", 0.4688", 0.5"
    3 1/4"Hex
    1/4"Standard
    89315A4100000
    3/16", 1/4", 5/16", 3/8", 7/16", 1/2", 9/16", 5/8", 11/16", 3/4", 13/16", 7/8"
    0.1875", 0.25", 0.3125", 0.375", 0.4375", 0.5", 0.5625", 0.625", 0.6875", 0.75", 0.8125", 0.875"
    3"Hex
    3/8"Standard
    89315A4200000
    3/16", 1/4", 5/16", 3/8", 7/16", 1/2"
    0.1875", 0.25", 0.3125", 0.375", 0.4375", 0.5"
    3 1/4"Hex
    1/4"Standard
    89315A4600000
    1/4", 5/16", 3/8", 7/16", 1/2", 9/16", 5/8", 11/16", 3/4"
    0.25", 0.3125", 0.375", 0.4375", 0.5", 0.5625", 0.625", 0.6875", 0.75"
    2 5/8"Hex
    3/8"Standard
    89315A4300000
    1/4", 7/8", 1 1/8"
    0.25", 0.875", 1.125"
    3"Hex
    3/8"Standard
    89315A45000000
    9/16", 5/8", 11/16", 3/4", 13/16", 7/8", 15/16", 1"
    0.5625", 0.625", 0.6875", 0.75", 0.8125", 0.875", 0.9375", 1"
    2 7/8"Hex
    3/8"Standard
    89315A4400000
     
    Titanium Aluminum Nitride (TiAlN) Coated
    4.0 mm, 6.0 mm, 8.0 mm, 10.0 mm, 12.0 mm, 14.0 mm, 16.0 mm, 18.0 mm, 20.0 mm0.1575", 0.2362", 0.315", 0.3937", 0.4724", 0.5512", 0.6299", 0.7087", 0.7874"
    76 mmQuick-Change Hex
    6.35 mmStandard
    89275A3600000
    4.0 mm, 14.0 mm, 16.0 mm, 18.0 mm, 20.0 mm, 22.0 mm, 24.0 mm, 26.0 mm, 28.0 mm, 30.0 mm0.1575", 0.5512", 0.6299", 0.7087", 0.7874", 0.8661", 0.9449", 1.0236", 1.1024", 1.1811"
    95 mmHex
    6.35 mmStandard
    89275A37000000
     
    Uncoated
    1/8", 5/32", 3/16", 7/32", 1/4", 9/32", 5/16", 11/32", 3/8", 13/32", 7/16", 15/32", 1/2"
    0.125", 0.1563", 0.1875", 0.2188", 0.25", 0.2813", 0.3125", 0.3438", 0.375", 0.4063", 0.4375", 0.4688", 0.5"
    3 1/4"Hex
    1/4"Standard
    8841A2100000
    3/16", 1/4", 5/16", 3/8", 7/16", 1/2", 9/16", 5/8", 11/16", 3/4", 13/16", 7/8"
    0.1875", 0.25", 0.3125", 0.375", 0.4375", 0.5", 0.5625", 0.625", 0.6875", 0.75", 0.8125", 0.875"
    3"Hex
    3/8"Standard
    8841A2400000
    3/16", 1/4", 5/16", 3/8", 7/16", 1/2"
    0.1875", 0.25", 0.3125", 0.375", 0.4375", 0.5"
    3 3/8"Hex
    1/4"Standard
    8841A2200000
    1/4", 5/16", 3/8", 7/16", 1/2", 9/16", 5/8", 11/16", 3/4"
    0.25", 0.3125", 0.375", 0.4375", 0.5", 0.5625", 0.625", 0.6875", 0.75"
    2 5/8"Hex
    3/8"Standard
    8841A2300000
    1/4", 3/8", 1/2", 5/8", 3/4", 7/8", 1", 1 1/8", 1 1/4", 1 3/8"
    0.25", 0.375", 0.5", 0.625", 0.75", 0.875", 1", 1.125", 1.25", 1.375"
    3 1/8"Hex
    3/8"Standard
    8841A2500000
    9/16", 5/8", 11/16", 3/4", 13/16", 7/8", 15/16", 1"
    0.5625", 0.625", 0.6875", 0.75", 0.8125", 0.875", 0.9375", 1"
    2 1/2"Hex
    3/8"Standard
    8841A3300000
    13/16", 7/8", 15/16", 1", 1 1/16", 1 1/8", 1 3/16", 1 1/4", 1 5/16", 1 3/8"
    0.8125", 0.875", 0.9375", 1", 1.0625", 1.125", 1.1875", 1.25", 1.3125", 1.375"
    2 1/8"Hex
    3/8"Standard
    8841A34000000
    7/8", 1 1/8"
    0.875", 1.125"
    3"Hex
    3/8"Standard
    8841A3500000
    4.0 mm, 6.0 mm, 8.0 mm, 10.0 mm, 12.0 mm, 14.0 mm, 16.0 mm, 18.0 mm, 20.0 mm, 22.0 mm0.1575", 0.2362", 0.315", 0.3937", 0.4724", 0.5512", 0.6299", 0.7087", 0.7874", 0.8661"
    76 mmHex
    10 mmStandard
    89275A1400000
    5.0 mm, 7.5 mm, 10.0 mm, 13.0 mm, 16.0 mm, 19.0 mm, 21.0 mm, 23.0 mm, 26.0 mm, 29.0 mm, 31.0 mm, 33.0 mm, 35.0 mm0.1968", 0.2953", 0.3937", 0.5118", 0.6299", 0.748", 0.8268", 0.9055", 1.0236", 1.1417", 1.2205", 1.2992", 1.378"
    79 mmHex
    11.1 mmStandard
    89275A1500000
    6.0 mm, 8.0 mm, 10.0 mm, 12.0 mm, 14.0 mm, 16.0 mm, 18.0 mm0.2362", 0.315", 0.3937", 0.4724", 0.5512", 0.6299", 0.7087"
    64 mmHex
    10 mmStandard
    89275A1300000
     

    Step Drill High-Speed Steel Bit Sets

    Image of Product. Front orientation. Drill Bits. Step Drill High-Speed Steel Bit Sets.
    Image of Specification. Standard. Front orientation. Contains Border. Standard Point. For Metal.

    Standard

    Drill multiple hole sizes using only one bit. These have steps with progressively larger diameters—the deeper they drill, the bigger the hole. Count the steps as you drill to achieve the proper size. These bits also deburr as they cut, so they're good for thin materials like sheet metal and plastic panels. Wear and heat resistant, high-speed steel is versatile for use on a range of 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.
    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.
    No. of
    Pieces
    Drill Bit Sizes Included
    System of
    Measurement
    Drill Bit Point
    Style
    Container
    Type
    Each
    Titanium Nitride (TiN) Coated
    31 each in sizes 1/8"-1/2", 3/16"-1/2", 1/4"-3/4"InchStandard Point
    Plastic Pouch89315A480000000
     
    Uncoated
    31 each in sizes 1/8"-1/2", 3/16"-1/2", 1/4"-3/4"InchStandard Point
    8841A3200000
    41 each in sizes 1/8"-1/2", 3/16"-1/2", 3/16"-7/8", 13/16"-1 3/8"InchStandard Point
    Plastic Case8841A36000000
     

    Multidiameter High-Speed Steel Step Drill Bits

    Image of Product. Side1 orientation. Drill Bits. Multidiameter High-Speed Steel Step Drill Bits, Style A, 3-Flat Shank, Round Shank.
    Image of Product. Side1 orientation. Drill Bits. Multidiameter High-Speed Steel Step Drill Bits, Style B, 3-Flat Shank, Round Shank.

    Style A

    Round Shank

    3-Flat Shank

    Style B

    Round Shank

    3-Flat Shank

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

    Standard

    With no fixed diameters, one bit cuts holes of almost any size within a range. Slip a washer (not included) over the bit to set your diameter. The washer acts as stop while drilling, so choose a washer with an inner diameter that matches your desired hole size. Wear and heat resistant, these high-speed steel bits are versatile for use on a range of 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.
    Shank
    Style
    Drill Bit Size
    Decimal Size
    Equiv.
    Overall
    Lg.
    Max. Drilling
    Dp.
    Type
    Size
    Drill Bit
    Point Type
    Each
     
    Black Oxide
    A1/8" to 9/16"0.125" to 0.5625"
    2 1/4"0.08"Round/3-Flat
    1/4"Standard
    8910A11000000
    A1/4" to 13/16"0.25" to 0.8125"
    2 3/4"0.08"Round/3-Flat
    3/8"Standard
    8910A1200000
    A5/8" to 1 3/16"0.625" to 1.1875"
    3"0.08"Round/3-Flat
    3/8"Standard
    8910A1300000
    A1" to 1 5/8"1" to 1.625"
    3 1/4"0.08"Round/3-Flat
    3/8"Standard
    8910A14000000
    B1 1/2" to 2 1/16"1.5" to 2.0625"
    2 3/4"0.08"Round/3-Flat
    3/8"8910A15000000
     

    Cobalt Steel Step Drill Bits

    Image of Product. Front orientation. Drill Bits. Cobalt Steel Step Drill Bits.
    Image of Specification. Standard. Front orientation. Contains Border. Standard Point. For Metal.

    Standard

    One cobalt bit drills multiple hole sizes and lasts twice as long as high-speed steel. They have steps with progressively larger diameters—the deeper they drill, the bigger the hole. Count the steps as you drill to achieve the proper size. These bits also deburr as they cut, so they're good for thin materials like sheet metal and plastic panels. Wear and heat resistant, high-speed steel is versatile for use on a range of materials.
    Uncoated—Polished to eject chips, these are also known as bright finish bits.
    Shank
    Drill Bit Size
    Decimal Size Equiv.
    Overall
    Lg.
    Type
    Size
    Drill Bit
    Point Type
    Each
     
    Uncoated
    1/8", 5/32", 3/16", 7/32", 1/4", 9/32", 5/16", 11/32", 3/8", 13/32", 7/16", 15/32", 1/2"
    0.125", 0.1563", 0.1875", 0.2188", 0.25", 0.2813", 0.3125", 0.3438", 0.375", 0.4063", 0.4375", 0.4688", 0.5"
    3 1/4"Hex
    1/4"Standard
    8841A51000000
    3/16", 1/4", 5/16", 3/8", 7/16", 1/2", 9/16", 5/8", 11/16", 3/4", 13/16", 7/8"
    0.1875", 0.25", 0.3125", 0.375", 0.4375", 0.5", 0.5625", 0.625", 0.6875", 0.75", 0.8125", 0.875"
    3"Hex
    3/8"Standard
    8841A5300000
    3/16", 1/4", 5/16", 3/8", 7/16", 1/2"
    0.1875", 0.25", 0.3125", 0.375", 0.4375", 0.5"
    3 3/8"Hex
    1/4"Standard
    8841A5200000
    1/4", 5/16", 3/8", 7/16", 1/2", 9/16", 5/8", 11/16", 3/4"
    0.25", 0.3125", 0.375", 0.4375", 0.5", 0.5625", 0.625", 0.6875", 0.75"
    2 5/8"Hex
    3/8"Standard
    8841A5400000
    9/16", 5/8", 11/16", 3/4", 13/16", 7/8", 15/16", 1"
    0.5625", 0.625", 0.6875", 0.75", 0.8125", 0.875", 0.9375", 1"
    2 1/2"Hex
    7/16"Standard
    8841A5500000
    7/8", 1 1/8"
    0.875", 1.125"
    3"Hex
    7/16"Standard
    8841A56000000
     

    Counterbore Drill Bits

    Image of Product. Front orientation. Contains Annotated. Counterbore Drill Bits. Counterbore Drill Bits.
    Often called step drill bits, these drill and counterbore holes at the same time. After drilling and counterboring, tap the hole and install your fastener. The body diameter may decrease after multiple sharpenings.
    Dia.
    Lg.
    For Screw
    Size
    Body
    Step
    Step
    Overall
    Point
    Angle
    For Use On
    Each
    Uncoated High-Speed Steel
    No. 6
    0.250"0.15"1/2"4"118°Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel8914A31000000
    No. 8
    0.290"0.178"1/2"4 1/4"118°Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel8914A3200000
    No. 10
    0.332"0.204"5/8"4 3/4"118°Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel8914A3300000
    1/4"
    0.406"0.281"11/16"5 1/4"118°Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel8914A3400000
    5/16"
    0.500"0.344"3/4"6"118°Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel8914A3500000
    3/8"
    0.594"0.406"7/8"7 1/8"118°Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel8914A3600000
    7/16"
    0.688"0.469"1"7 5/8"118°Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel8914A3800000
    1/2"
    0.781"0.531"1"9 7/8"118°Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel8914A37000000
     

    Countersink Drill Bits for Screws

    Image of Product. Front orientation. Contains Annotated. Countersink Drill Bits. Countersink Drill Bits for Screws.
    Also known as step drill bits, these bits countersink as they drill. The 82° countersink angle is compatible with the profile of flat- and oval-head inch screws. After multiple sharpenings, the drill bit diameter may become smaller.
    Dia.
    Lg.
    82°
    Countersink Angle
    For Screw
    Size
    Body
    Step
    Step
    Overall
    Shank
    Dia.
    Point
    Angle
    For Use On
    Each
    Uncoated High-Speed Steel
     
    2 Flutes
    No. 6
    0.281"0.142"1/2"4 1/4"0.2813"118°Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel8914A51000000
    No. 8
    0.332"0.169"1/2"4 3/4"0.3320"118°Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel8914A5200000
    No. 10
    0.386"0.196"5/8"5 1/8"0.3860"118°Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel8914A5300000
    1/4"
    1/2"0.257"11/16"6"0.5000"118°Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel8914A5400000
    5/16"
    5/8"0.320"3/4"7 1/8"0.6250"118°Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel8914A5500000
    3/8"
    3/4"0.383"7/8"5"0.7500"118°Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel8914A5600000
    7/16"
    0.813"0.446"1"5 1/4"0.8125"118°Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel8914A58000000
    1/2"
    7/8"0.510"1"5 1/2"0.8750"118°Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel8914A57000000
     
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