1. Hydraulic forming, exquisite keyway, close nesting 2. Full electroplating and heating treatment, sturdy and durable, not easy to rust 3. High carbon steel material, hardened by heat treatment, strong impact resistance 4. Strengthen and lengthen the design, easy to disassemble 5. Material: carbon steel 6. Weight: about 53g/piece 7. Size: about 4.48 cm long, with an inner hole about 12.8 mm
