1. Material: CR-MO chrome molybdenum steel 2. Weight: about 800g/set 3. Size: about 165x125x52mm/set 4. Purpose: used for disassembly and assembly of wheel nuts 5. Contains: 4 sleeves (specification 17/19/21/22 mm); 1 punch (length 80 mm) 6. Features: the material is strong and not easy to deform, good toughness, high hardness, various specifications, simple and easy to use, wide applicability, wear-resistant and durable