Specifications: It can be used with a socket wrench, which is more durable after heat treatment. Featured with bearing steel material, it has high hardness, sharp cutting and long service life. It is particularly designed to remove damaged or corroded nuts without damaging the bolts thread. Item Name: Nut Splitter Material: Alloy Steel Features: Durable, Easy to Use, Removal Tool Size Chart: 1#: Full Length: 80mm/3.15", Application Range: 9mm-12mm/0.35"-0.47", Hole Diameter: 12mm/0.47" (Approx.) 2#: Full Length: 102mm/4.02", Application Range: 12mm-16mm/0.47"-0.63", Hole Diameter: 14mm/0.55" (Approx.) 3#: Full Length: 130mm/5.12", Application Range: 16mm-22mm/0.63"-0.87", Hole Diameter: 18mm/0.71" (Approx.) 4#: Full Length: 150mm/5.91", Application Range: 22mm-27mm/0.87"-1.06", Hole Diameter: 21mm/0.83" (Approx.) Notes: Due to the light and screen setting difference, the items color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x Nut Splitter