8pcs H3 3mm Screwdriver Insert Bits. H3 screwdriver insect bit with hex shank, 25mm long, 3mm hex head. Hex Shank Size: 6.35mm / 1/4". Total Length: 25mm / 0.98". 1/4" quick-change shank is designed to work with impact drivers, and reduces slipping in standard drill chucks.
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