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    7 Products
    About Counterbores
    industrial info icon

    Create flat-bottomed holes, so your screw heads sit flush, recessed, or slightly raised.

    Fast-Cutting Smooth-Finish Drill-Bit Counterbores for Wood

    Image of Product. Front orientation. ZoomedIn view. Counterbores. Fast-Cutting Smooth-Finish Drill-Bit Counterbores for Wood.
    With thin cutting edges to minimize contact with the hole, these counterbores make smooth, accurate cuts at high speeds. Attach them to any drill bit with a 1/2" shank and a cutting diameter of 1/2" or larger. They move up and down the drill bit and lock into place with set screws to match the length of the screw you're installing.
    Carbon SteelAbout Carbon Steel
    Uncoated
    Body
    Dia.
    Overall
    Lg.
    For Shank
    Dia.
    For Min. Drill
    Bit Cutting Dia.
    Mfr.
    Each
    1 1/8"1"1/2"1/2"Stern2921A12000000
    1 1/4"1"1/2"1/2"Stern2921A1300000
    1 3/8"1"1/2"1/2"Stern2921A1400000
    1 1/2"1"1/2"1/2"Stern2921A1500000
    1 3/4"1"1/2"1/2"Stern2921A17000000
    2"1 1/4"1/2"1/2"Stern2921A19000000
    2 1/2"1 1/4"1/2"1/2"Stern2921A24000000
     
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