Klein® screwdrivers give professionals extra quality features that have made the Klein® name famous for hand tools-features that assure greater convenience, comfort and efficiency in use, plus exceptional strength and durability. All Klein® drivers are made of the highest quality tempered steel, carefully heat treated for maximum strength. Shafts have integral flanges that provide an extra strong, torque proof anchor in the handle. Strong, durable black tips are forged and precision ground with square edges to fit screw openings securely. They resist slippage and provide positive turning action.