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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
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    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"Steel2864A113000000
    1/64"0.0156"1/64"3/16"4"3/16"Steel2864A21300000
    1/32"0.0313"1/32"1/8"4"1/8"Steel2864A12600000
    1/32"0.0313"1/32"3/16"4"3/16"Steel2864A22600000
    3/64"0.0469"3/64"3/16"4"3/16"Steel2864A24100000
    1/16"0.0625"1/16"3/16"4"3/16"Steel2864A24500000
     
    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"Steel3016A81100000
    1/16"0.0625"1/16"1/4"9 1/2"5/16"Steel3016A83700000
    5/64"0.0781"5/64"1/4"4 1/2"5/16"Steel3016A81200000
    5/64"0.0781"5/64"1/4"9 1/2"5/16"Steel3016A83800000
    3/32"0.0938"3/32"1/4"4 1/2"5/16"Steel3016A81400000
    3/32"0.0938"3/32"1/4"9 1/2"5/16"Steel3016A84100000
    7/64"0.1094"7/64"1/4"4 1/2"5/16"Steel3016A81600000
    7/64"0.1094"7/64"1/4"9 1/2"5/16"Steel3016A84300000
    1/8"0.1250"1/8"1/4"4 1/2"5/16"Steel3016A81700000
    1/8"0.1250"1/8"1/4"9 1/2"5/16"Steel3016A84400000
    9/64"0.1406"9/64"1/4"4 1/2"5/16"Steel3016A81900000
    9/64"0.1406"9/64"1/4"9 1/2"5/16"Steel3016A84600000
    5/32"0.1563"5/32"1/4"4 1/2"5/16"Steel3016A82100000
    5/32"0.1563"5/32"1/4"9 1/2"5/16"Steel3016A84700000
    11/64"0.1719"11/64"1/4"4 1/2"7/16"Steel3016A82300000
    11/64"0.1719"11/64"1/4"9 1/2"7/16"Steel3016A84900000
    3/16"0.1875"3/16"1/4"4 1/2"7/16"Steel3016A82400000
    3/16"0.1875"3/16"1/4"9 1/2"7/16"Steel3016A85100000
    13/64"0.2031"13/64"1/4"4 1/2"7/16"Steel3016A82700000
    13/64"0.2031"13/64"1/4"9 1/2"7/16"Steel3016A85400000
    7/32"0.2188"7/32"1/4"4 1/2"7/16"Steel3016A82800000
    7/32"0.2188"7/32"1/4"9 1/2"7/16"Steel3016A85500000
    15/64"0.2344"15/64"1/4"4 1/2"7/16"Steel3016A82900000
    15/64"0.2344"15/64"1/4"9 1/2"7/16"Steel3016A85600000
    1/4"0.2500"1/4"1/4"4 1/2"7/16"Steel3016A83100000
    1/4"0.2500"1/4"1/4"9 1/2"7/16"Steel3016A85700000
    1/4"0.2500"1/4"3/8"4 1/2"9/16"Steel3016A83200000
    1/4"0.2500"1/4"3/8"9 1/2"9/16"Steel3016A85800000
    17/64"0.2656"17/64"3/8"4 1/2"9/16"Steel3016A83300000
    17/64"0.2656"17/64"3/8"9 1/2"9/16"Steel3016A85900000
    9/32"0.2813"9/32"3/8"4 1/2"9/16"Steel3016A83400000
    9/32"0.2813"9/32"3/8"9 1/2"9/16"Steel3016A86100000
    19/64"0.2969"19/64"3/8"4 1/2"9/16"Steel3016A83500000
    19/64"0.2969"19/64"3/8"9 1/2"9/16"Steel3016A86200000
    5/16"0.3125"5/16"3/8"4 1/2"9/16"Steel3016A83600000
    5/16"0.3125"5/16"3/8"9 1/2"9/16"Steel3016A86300000
     
    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"Steel2864A11100000
    80 Ga.0.0135"0.014"3/16"4"3/16"Steel2864A21100000
    79 Ga.0.0145"0.015"1/8"4"1/8"Steel2864A11200000
    79 Ga.0.0145"0.015"3/16"4"3/16"Steel2864A21200000
    78 Ga.0.0160"0.016"1/8"4"1/8"Steel2864A11400000
    78 Ga.0.0160"0.016"3/16"4"3/16"Steel2864A21400000
    77 Ga.0.0180"0.018"1/8"4"1/8"Steel2864A11500000
    77 Ga.0.0180"0.018"3/16"4"3/16"Steel2864A21500000
    76 Ga.0.0200"0.02"1/8"4"1/8"Steel2864A11600000
    76 Ga.0.0200"0.02"3/16"4"3/16"Steel2864A21600000
    75 Ga.0.0210"0.021"1/8"4"1/8"Steel2864A11700000
    75 Ga.0.0210"0.021"3/16"4"3/16"Steel2864A21700000
    74 Ga.0.0225"0.023"1/8"4"1/8"Steel2864A11800000
    74 Ga.0.0225"0.023"3/16"4"3/16"Steel2864A21800000
    73 Ga.0.0240"0.024"1/8"4"1/8"Steel2864A11900000
    73 Ga.0.0240"0.024"3/16"4"3/16"Steel2864A21900000
    72 Ga.0.0250"0.025"1/8"4"1/8"Steel2864A12100000
    72 Ga.0.0250"0.025"3/16"4"3/16"Steel2864A22100000
    71 Ga.0.0260"0.026"1/8"4"1/8"Steel2864A12200000
    71 Ga.0.0260"0.026"3/16"4"3/16"Steel2864A22200000
    70 Ga.0.0280"0.028"1/8"4"1/8"Steel2864A12300000
    70 Ga.0.0280"0.028"3/16"4"3/16"Steel2864A22300000
    69 Ga.0.0292"0.029"1/8"4"1/8"Steel2864A12400000
    69 Ga.0.0292"0.029"3/16"4"3/16"Steel2864A22400000
    68 Ga.0.0310"0.031"1/8"4"1/8"Steel2864A12500000
    68 Ga.0.0310"0.031"3/16"4"3/16"Steel2864A22500000
    67 Ga.0.0320"0.032"1/8"4"1/8"Steel2864A12700000
    67 Ga.0.0320"0.032"3/16"4"3/16"Steel2864A22700000
    66 Ga.0.0330"0.033"1/8"4"1/8"Steel2864A12800000
    66 Ga.0.0330"0.033"3/16"4"3/16"Steel2864A22800000
    65 Ga.0.0350"0.035"1/8"4"1/8"Steel2864A12900000
    65 Ga.0.0350"0.035"3/16"4"3/16"Steel2864A22900000
    64 Ga.0.0360"0.036"1/8"4"1/8"Steel2864A13100000
    64 Ga.0.0360"0.036"3/16"4"3/16"Steel2864A23100000
    63 Ga.0.0370"0.037"1/8"4"1/8"Steel2864A13200000
    63 Ga.0.0370"0.037"3/16"4"3/16"Steel2864A23200000
    62 Ga.0.0380"0.038"1/8"4"1/8"Steel2864A13300000
    62 Ga.0.0380"0.038"3/16"4"3/16"Steel2864A23300000
    61 Ga.0.0390"0.039"1/8"4"1/8"Steel2864A13400000
    61 Ga.0.0390"0.039"3/16"4"3/16"Steel2864A23400000
    60 Ga.0.0400"0.04"1/8"4"1/8"Steel2864A13500000
    60 Ga.0.0400"0.04"3/16"4"3/16"Steel2864A23500000
    59 Ga.0.0410"0.041"1/8"4"1/8"Steel2864A13600000
    59 Ga.0.0410"0.041"3/16"4"3/16"Steel2864A23600000
    58 Ga.0.0420"0.042"1/8"4"1/8"Steel2864A13700000
    58 Ga.0.0420"0.042"3/16"4"3/16"Steel2864A23700000
    57 Ga.0.0430"0.043"1/8"4"1/8"Steel2864A13800000
    57 Ga.0.0430"0.043"3/16"4"3/16"Steel2864A23800000
    56 Ga.0.0465"0.047"1/8"4"1/8"Steel2864A13900000
    56 Ga.0.0465"0.047"3/16"4"3/16"Steel2864A23900000
    55 Ga.0.0520"0.052"3/16"4"3/16"Steel2864A24200000
    54 Ga.0.0550"0.055"3/16"4"3/16"Steel2864A24300000
    53 Ga.0.0595"0.06"3/16"4"3/16"Steel2864A24400000
     
    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"Steel3016A81300000
    43 Ga.0.0890"0.089"1/4"9 1/2"5/16"Steel3016A83900000
    40 Ga.0.0980"0.098"1/4"4 1/2"5/16"Steel3016A81500000
    40 Ga.0.0980"0.098"1/4"9 1/2"5/16"Steel3016A84200000
    30 Ga.0.1285"0.129"1/4"4 1/2"5/16"Steel3016A81800000
    30 Ga.0.1285"0.129"1/4"9 1/2"5/16"Steel3016A84500000
    21 Ga.0.1590"0.159"1/4"4 1/2"5/16"Steel3016A82200000
    21 Ga.0.1590"0.159"1/4"9 1/2"5/16"Steel3016A84800000
    11 Ga.0.1910"0.191"1/4"4 1/2"7/16"Steel3016A82500000
    11 Ga.0.1910"0.191"1/4"9 1/2"7/16"Steel3016A85200000
    10 Ga.0.1935"0.194"1/4"4 1/2"7/16"Steel3016A82600000
    10 Ga.0.1935"0.194"1/4"9 1/2"7/16"Steel3016A85300000
     
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