Lasts 200x longer than a standard bit! For Impact Drivers For continuous high torque fastening with impact drivers. Ideal for driving self drilling metal screws and long wood screws. The high torque produced by impact drivers will damage standard screwdriver bits but the new Makita double ended torsion screwdriver bit out performs beyond all expectations Features Long lasting torsion bits for impact drivers For continuous high torque fastening with impact drivers Double ended PZ2 bits Shock absorbing Steel construction