1. Material: metal 2. Surface chrome plating 3. Sturdy and durable 4. Superb welding 5. Easy to open and close 6. Suitable for wallet, handbag DIY craft 7. Weight: 30g 8. Length: square small 8.5 cm, square medium 12.5 cm, square large 18 cm, round small 9 cm, round medium 12.5 cm, round large 16 cm