ER Tool Extenders - Southeast Tool SE04897; 1 Shank, 168mm Overall length, 28mm Outside diameter, ER20 Collet, 04623 Wrench, SE23120 Nut. Extension length should not exceed a 4:1 ratio of length to diameter. For example, a 1/2 shank should not extend more than 2 in front of the holder. This is true only for applications where the extension is rotating. Extenders have threaded thru holes for a backup screw. Includes nut. Collet and wrench sold separately

*Most Southeast Tool products are made in the US. This item is actually made in Taiwan.

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