The Mayhew Tools 10-pc Phillips Dual Drive Set, No. 16002, features a range of sizes allowing users to fasten or unfasten a variety of common Phillips screws. The bits are made from S2 tool steel and have a titanium coating for added strength and wear resistance. The low-profile dual-drive design allows for use with a ratchet or 11mm wrench. In addition, the set features proprietary heat treatment for added durability and is backed by a lifetime warranty. The convenient storage rail keeps the bits organized and easily accessible.