McMaster-Carr logo
    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)
    11 Products
    About Drill Bits
    industrial info icon

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

    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
    Drill Bit
    Point Type
    Each
    Powder Coated
     
    Round Shank
    3/8"
    		0.375"
    		54"53"3/16"Screw
    		000000000000
    3/8"
    		0.375"
    		72"71"3/16"Screw
    		00000000000
    1/2"
    		0.5"
    		54"53"1/4"Screw
    		00000000000
    1/2"
    		0.5"
    		72"71"1/4"Screw
    		00000000000
    9/16"
    		0.5625"
    		54"53"1/4"Screw
    		00000000000
    9/16"
    		0.5625"
    		72"71"1/4"Screw
    		00000000000
    5/8"
    		0.625"
    		54"53"1/4"Screw
    		00000000000
    3/4"
    		0.75"
    		54"53"1/4"Screw
    		00000000000
    1"
    		1"
    		54"53"1/4"Screw
    		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"—Round
    		—10"—Steel000000000000
     
    Ball Guides
    3/16"3/16"Round
    		1 1/2", 2"—2Plastic00000000000
     
    back to top