1. Professional Tool Set: This nut splitter set includes 4 differentsized extractors with a range of 9–27 mm, for mechanics, DIY enthusiasts, and professionals dealing with stubborn fasteners—made from strength chrome vanadium steel for exceptional torque resistance. 2. Damaged Nut Solution: Specifically designed to break rusted, rounded, damaged, or corroded nuts without harming the underlying bolt threads—the precisioncut jaws apply targeted pressure to crack even the most stubborn fasteners. 3. Comprehensive Size Coverage: The complete set includes 4 sizes (9–12 mm, 12–16 mm, 16–22 mm, and 22–27 mm) to handle virtually any stuck nut situation on automotive parts, plumbing fixtures, machinery, or home projects. 4. Easy to Use: Simply position the splitter over the problematic nut, tighten the forcing screw with a socket wrench on the hex head, and watch as controlled pressure splits the nut without damaging the underlying bolt or surrounding components.