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

    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
    Each
    Black Oxide
     
    Round Shank
    21/64"
    0.328"
    18"3.31"5/16"Standard
    0000000000000
    21/64"
    0.328"
    36"3.31"5/16"Standard
    000000000000
    25/64"
    0.39"
    18"3.88"3/8"Standard
    000000000000
    25/64"
    0.39"
    36"3.88"3/8"Standard
    000000000000
    29/64"
    0.453"
    18"4.19"7/16"Standard
    000000000000
    29/64"
    0.453"
    36"4.19"7/16"Standard
    000000000000
    33/64"
    0.515"
    18"4.81"1/2"Standard
    000000000000
    33/64"
    0.515"
    36"4.81"1/2"Standard
    000000000000
     

    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
    Each
    Black Oxide/Carbide Tipped
     
    Round Shank
    21/64"
    0.328"
    18"4"5/16"Standard
    0000000000000
    21/64"
    0.328"
    36"4"5/16"Standard
    000000000000
    7/16"
    0.438"
    18"4"3/8"Standard
    000000000000
    7/16"
    0.438"
    36"4"3/8"Standard
    000000000000
    9/16"
    0.563"
    18"4"1/2"Standard
    000000000000
    9/16"
    0.563"
    36"4"1/2"Standard
    000000000000
     

    Flexible-Shaft Drill Bits for Wire Installation

    Image of ProductInUse. Front orientation. Drill Bits. Flexible-Shaft Drill Bits for Wire Installation.
    Image of Product. Front orientation. Contains Inset. Drill Bits. Flexible-Shaft Drill Bits for Wire Installation, Round Shank.

    Round Shank

    Drill inside walls and between floors to install electrical wiring without cutting extra access holes. The shaft on these bits flexes for a long reach in any direction. To install wire, first strip the end and attach it to the small hole at the tip of the bit. Then pull wire back through the drilled hole. Also known as bell hanger bits.
    Drill Bit
    Size
    Decimal Size
    Equiv.
    Overall
    Lg.
    Max. Drilling
    Dp.
    Shank
    Size
    Each
    Powder Coated
     
    Round Shank
    3/8"
    0.375"
    54"53"3/16"000000000000
    3/8"
    0.375"
    72"71"3/16"00000000000
    1/2"
    0.5"
    54"53"1/4"00000000000
    1/2"
    0.5"
    72"71"1/4"00000000000
    9/16"
    0.5625"
    54"53"1/4"00000000000
    9/16"
    0.5625"
    72"71"1/4"00000000000
    5/8"
    0.625"
    54"53"1/4"00000000000
    3/4"
    0.75"
    54"53"1/4"00000000000
    1"
    1"
    54"53"1/4"00000000000
     
    Drill Bit Guides
    Image of ProductInUse. Hand Guide with Drill Bit. Front orientation. Drill Bit Guides. Hand Guides.
    Image of ProductInUse. Ball Guide with Drill Bit. Front orientation. Drill Bit Guides. Ball Guides.

    Hand Guide with Drill Bit

    Ball

    Guide

    with

    Drill Bit

    Hand Guides—Support and position the shaft as you drill.
    Ball Guides—Keep bits centered between studs and drywall.
    For Drill Bit
    Shaft Size
    For Drill Bit
    Shank Size
    For Drill Bit
    Shank Type
    Dia.
    Lg.
    No. of
    Guides
    Material
    Each
    Hand Guides
    3/16", 1/4"Round10"Steel000000000000
     
    Ball Guides
    3/16"3/16"Round1 1/2", 2"2Plastic00000000000
     
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