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    107 Products

    Extensions for Round-Shank Drill Bits

    Attach to the shank of a drill bit to extend its reach.
    One-Piece Extensions—To attach one-piece extensions, insert a drill bit into the extension and tighten the knurled collar.
    Two-Piece Extensions—To attach two-piece extensions, insert a drill bit into the collet, then thread the collet onto the extension and tighten with a wrench.
    For Drill Bit
    Size
    Size Decimal
    Equiv.
    Shank
    Size
    Shank
    Size
    Overall
    Lg.
    OD
    Material
    Each
    For Inch Drill Bits
     
    Image of Product. Front orientation. Drill Bit Extensions. Extensions for Round-Shank Drill Bits, One-Piece Extensions.
    One-Piece Extensions
    1/64"0.0156"1/64"1/8"4"1/8"Steel00000000000000
    1/64"0.0156"1/64"3/16"4"3/16"Steel0000000000000
    1/32"0.0313"1/32"1/8"4"1/8"Steel0000000000000
    1/32"0.0313"1/32"3/16"4"3/16"Steel0000000000000
    3/64"0.0469"3/64"3/16"4"3/16"Steel0000000000000
    1/16"0.0625"1/16"3/16"4"3/16"Steel0000000000000
     
    Image of Product. Front orientation. Contains Annotated. Drill Bit Extensions. Extensions for Round-Shank Drill Bits, Two-Piece Extensions.
    Two-Piece Extensions
    1/16"0.0625"1/16"1/4"4 1/2"5/16"Steel0000000000000
    1/16"0.0625"1/16"1/4"9 1/2"5/16"Steel0000000000000
    5/64"0.0781"5/64"1/4"4 1/2"5/16"Steel0000000000000
    5/64"0.0781"5/64"1/4"9 1/2"5/16"Steel0000000000000
    3/32"0.0938"3/32"1/4"4 1/2"5/16"Steel0000000000000
    3/32"0.0938"3/32"1/4"9 1/2"5/16"Steel0000000000000
    7/64"0.1094"7/64"1/4"4 1/2"5/16"Steel0000000000000
    7/64"0.1094"7/64"1/4"9 1/2"5/16"Steel0000000000000
    1/8"0.1250"1/8"1/4"4 1/2"5/16"Steel0000000000000
    1/8"0.1250"1/8"1/4"9 1/2"5/16"Steel0000000000000
    9/64"0.1406"9/64"1/4"4 1/2"5/16"Steel0000000000000
    9/64"0.1406"9/64"1/4"9 1/2"5/16"Steel0000000000000
    5/32"0.1563"5/32"1/4"4 1/2"5/16"Steel0000000000000
    5/32"0.1563"5/32"1/4"9 1/2"5/16"Steel0000000000000
    11/64"0.1719"11/64"1/4"4 1/2"7/16"Steel0000000000000
    11/64"0.1719"11/64"1/4"9 1/2"7/16"Steel0000000000000
    3/16"0.1875"3/16"1/4"4 1/2"7/16"Steel0000000000000
    3/16"0.1875"3/16"1/4"9 1/2"7/16"Steel0000000000000
    13/64"0.2031"13/64"1/4"4 1/2"7/16"Steel0000000000000
    13/64"0.2031"13/64"1/4"9 1/2"7/16"Steel0000000000000
    7/32"0.2188"7/32"1/4"4 1/2"7/16"Steel0000000000000
    7/32"0.2188"7/32"1/4"9 1/2"7/16"Steel0000000000000
    15/64"0.2344"15/64"1/4"4 1/2"7/16"Steel0000000000000
    15/64"0.2344"15/64"1/4"9 1/2"7/16"Steel0000000000000
    1/4"0.2500"1/4"1/4"4 1/2"7/16"Steel0000000000000
    1/4"0.2500"1/4"1/4"9 1/2"7/16"Steel0000000000000
    1/4"0.2500"1/4"3/8"4 1/2"9/16"Steel0000000000000
    1/4"0.2500"1/4"3/8"9 1/2"9/16"Steel0000000000000
    17/64"0.2656"17/64"3/8"4 1/2"9/16"Steel0000000000000
    17/64"0.2656"17/64"3/8"9 1/2"9/16"Steel0000000000000
    9/32"0.2813"9/32"3/8"4 1/2"9/16"Steel0000000000000
    9/32"0.2813"9/32"3/8"9 1/2"9/16"Steel0000000000000
    19/64"0.2969"19/64"3/8"4 1/2"9/16"Steel0000000000000
    19/64"0.2969"19/64"3/8"9 1/2"9/16"Steel0000000000000
    5/16"0.3125"5/16"3/8"4 1/2"9/16"Steel0000000000000
    5/16"0.3125"5/16"3/8"9 1/2"9/16"Steel0000000000000
     
    For Wire Gauge Drill Bits
     
    Image of Product. Front orientation. Drill Bit Extensions. Extensions for Round-Shank Drill Bits, One-Piece Extensions.
    One-Piece Extensions
    80 Ga.0.0135"0.014"1/8"4"1/8"Steel0000000000000
    80 Ga.0.0135"0.014"3/16"4"3/16"Steel0000000000000
    79 Ga.0.0145"0.015"1/8"4"1/8"Steel0000000000000
    79 Ga.0.0145"0.015"3/16"4"3/16"Steel0000000000000
    78 Ga.0.0160"0.016"1/8"4"1/8"Steel0000000000000
    78 Ga.0.0160"0.016"3/16"4"3/16"Steel0000000000000
    77 Ga.0.0180"0.018"1/8"4"1/8"Steel0000000000000
    77 Ga.0.0180"0.018"3/16"4"3/16"Steel0000000000000
    76 Ga.0.0200"0.02"1/8"4"1/8"Steel0000000000000
    76 Ga.0.0200"0.02"3/16"4"3/16"Steel0000000000000
    75 Ga.0.0210"0.021"1/8"4"1/8"Steel0000000000000
    75 Ga.0.0210"0.021"3/16"4"3/16"Steel0000000000000
    74 Ga.0.0225"0.023"1/8"4"1/8"Steel0000000000000
    74 Ga.0.0225"0.023"3/16"4"3/16"Steel0000000000000
    73 Ga.0.0240"0.024"1/8"4"1/8"Steel0000000000000
    73 Ga.0.0240"0.024"3/16"4"3/16"Steel0000000000000
    72 Ga.0.0250"0.025"1/8"4"1/8"Steel0000000000000
    72 Ga.0.0250"0.025"3/16"4"3/16"Steel0000000000000
    71 Ga.0.0260"0.026"1/8"4"1/8"Steel0000000000000
    71 Ga.0.0260"0.026"3/16"4"3/16"Steel0000000000000
    70 Ga.0.0280"0.028"1/8"4"1/8"Steel0000000000000
    70 Ga.0.0280"0.028"3/16"4"3/16"Steel0000000000000
    69 Ga.0.0292"0.029"1/8"4"1/8"Steel0000000000000
    69 Ga.0.0292"0.029"3/16"4"3/16"Steel0000000000000
    68 Ga.0.0310"0.031"1/8"4"1/8"Steel0000000000000
    68 Ga.0.0310"0.031"3/16"4"3/16"Steel0000000000000
    67 Ga.0.0320"0.032"1/8"4"1/8"Steel0000000000000
    67 Ga.0.0320"0.032"3/16"4"3/16"Steel0000000000000
    66 Ga.0.0330"0.033"1/8"4"1/8"Steel0000000000000
    66 Ga.0.0330"0.033"3/16"4"3/16"Steel0000000000000
    65 Ga.0.0350"0.035"1/8"4"1/8"Steel0000000000000
    65 Ga.0.0350"0.035"3/16"4"3/16"Steel0000000000000
    64 Ga.0.0360"0.036"1/8"4"1/8"Steel0000000000000
    64 Ga.0.0360"0.036"3/16"4"3/16"Steel0000000000000
    63 Ga.0.0370"0.037"1/8"4"1/8"Steel0000000000000
    63 Ga.0.0370"0.037"3/16"4"3/16"Steel0000000000000
    62 Ga.0.0380"0.038"1/8"4"1/8"Steel0000000000000
    62 Ga.0.0380"0.038"3/16"4"3/16"Steel0000000000000
    61 Ga.0.0390"0.039"1/8"4"1/8"Steel0000000000000
    61 Ga.0.0390"0.039"3/16"4"3/16"Steel0000000000000
    60 Ga.0.0400"0.04"1/8"4"1/8"Steel0000000000000
    60 Ga.0.0400"0.04"3/16"4"3/16"Steel0000000000000
    59 Ga.0.0410"0.041"1/8"4"1/8"Steel0000000000000
    59 Ga.0.0410"0.041"3/16"4"3/16"Steel0000000000000
    58 Ga.0.0420"0.042"1/8"4"1/8"Steel0000000000000
    58 Ga.0.0420"0.042"3/16"4"3/16"Steel0000000000000
    57 Ga.0.0430"0.043"1/8"4"1/8"Steel0000000000000
    57 Ga.0.0430"0.043"3/16"4"3/16"Steel0000000000000
    56 Ga.0.0465"0.047"1/8"4"1/8"Steel0000000000000
    56 Ga.0.0465"0.047"3/16"4"3/16"Steel0000000000000
    55 Ga.0.0520"0.052"3/16"4"3/16"Steel0000000000000
    54 Ga.0.0550"0.055"3/16"4"3/16"Steel0000000000000
    53 Ga.0.0595"0.06"3/16"4"3/16"Steel0000000000000
     
    Image of Product. Front orientation. Contains Annotated. Drill Bit Extensions. Extensions for Round-Shank Drill Bits, Two-Piece Extensions.
    Two-Piece Extensions
    43 Ga.0.0890"0.089"1/4"4 1/2"5/16"Steel0000000000000
    43 Ga.0.0890"0.089"1/4"9 1/2"5/16"Steel0000000000000
    40 Ga.0.0980"0.098"1/4"4 1/2"5/16"Steel0000000000000
    40 Ga.0.0980"0.098"1/4"9 1/2"5/16"Steel0000000000000
    30 Ga.0.1285"0.129"1/4"4 1/2"5/16"Steel0000000000000
    30 Ga.0.1285"0.129"1/4"9 1/2"5/16"Steel0000000000000
    21 Ga.0.1590"0.159"1/4"4 1/2"5/16"Steel0000000000000
    21 Ga.0.1590"0.159"1/4"9 1/2"5/16"Steel0000000000000
    11 Ga.0.1910"0.191"1/4"4 1/2"7/16"Steel0000000000000
    11 Ga.0.1910"0.191"1/4"9 1/2"7/16"Steel0000000000000
    10 Ga.0.1935"0.194"1/4"4 1/2"7/16"Steel0000000000000
    10 Ga.0.1935"0.194"1/4"9 1/2"7/16"Steel0000000000000
     
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