1. materials: Each piece in this set is made of GCR15 tool steel to ensure durability and longevity. The durable construction means you can rely on these extractors for extensive use without worrying about wear, making them a reliable addition to your toolbox. 2. Exceptional Performance: With surface polishing and hardness, this screw extraction kit delivers strong torque for effortless removal of damaged screws and bolts. Whether you're dealing with stubborn machine screws or paintedover fixings, this kit rises to the challenge. 3. Versatile Use: Suitable for a variety of screw and bolt types, including wood, Phillips, flat, hex, and more, providing versatile functionality to tackle multiple fastening obstacles. It is an essential tool for any enthusiast or professional. 4. Userfriendly Design: The practical design of the set ensures easy operation, whether for household repairs, maintenance tasks, or office adjustments. Simplify your projects by having the right tool on hand to minimize effort and maximize efficiency.