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.