DescriptionMakita B-20921 Torsion Screwdriver Bit – Square DriveMakita B-20921 Torsion Screwdriver Bit – Square Drive with Makita Torsion Technology Designed for use with Makita Impact Drivers, but will fit any 1/4″ impact driver brand Shock Absorbing Design features Makita Torsion Technology Bit flexes during impact t Makita Torsion Screwdriver Bit – Square Drive