1. Material: alloy steel 2. Weight: about 13g/set 3. Size: about 4.5 cm long / piece 4. Specifications: 3x3mm, 3x4mm, 3x5mm, 3x6mm, 3x8mm 5. Scope of application: household 6. Features: high hardness, wear-resistant and durable, not easy to rust, complete specifications, easy to use
