Irwin Vise-Grip 91144 Single 11/16" Drill Bit Bit is constructed of M-7 high speed steel for high resistance to abrasion during tough drilling applications Three-flatted shank design provides better chuck grip and reduces slippage Ideal for use in keyless chucks All Silver & Deming bits are 6in. long and feature 1/2in. reduced shank that fits all 1/2in.
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