Product Description Klein's Philips-Tip Screwdrivers have professional 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. Klein Screwdrivers are made of the highest quality tempered steel, carefully heat-treated for maximum strength. Shafts will not bond or twist in normal use. Shafts have integral flanges that provide an extra-strong, torque-proof anchor in the handle. Strong, durable black tips are precision forged and ground with square edges to fit screw openings securely. From the Manufacturer Since 1857, the company operated by Mathias Klein and his descendants to the fifth generation, has grown and developed along with the telecommunications and electrical industries where Klein pliers first found major usages. Today, Klein tools Incorporated represents much more than Klein pliers. The company's product line has broadened to include virtually every major type of hand tool used in construction, electronics, mining and general industry in addition to the electrical and telecommunications fields. Klein offers a lifetime warranty on material defects and workmanship for the normal life of the product. The Klein 603-4B screwdriver has a metal stud that offers a convenient and easy way to bend, loop and connect solid wires while you are installing outlets and switches