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Extra tough bit for square head socket screws. This prevents the bit from breaking prematurely and extends its service life. Suitable for use with Wera impact screwdriver 921. With 1/4" hexagonal drive.Features and Benefits• Suitable for square head socket screws• Extra tough for long durability• 1/4" hexagon drive• For use with Wera impact screwdriver 921Contents868 S Square head socket bits for impact screwdrivers, # 2 x 70 mm