This Makita Impact Rated Black Screw Guide features a 1/4" Hex shank Bit Holder with a torsion zone, designed for use with impact drivers. The black coating prevents rusting, and it offers high durability with a longer life than standard bits. Constructed from high strength, heat-treated S2 special steel, it has precision-made tips for a perfect hold and is up to 20% more durable than standard bits. The length is 80mm and it is suitable for use with 1/4" Hex Bits. Country of Origin: China.