1. Material: copper, aluminum
2. Scope of application: fire door lock
3. Technology: brushed
4. Large thickened lock body, easy and convenient to open and close, no rust
5. Lock hole closed door design, anti-theft strong and more secure
6. 6 marbles design, to prevent tinfoil unlocking, anti-picking
7. Brushed technology to deal with the lock body, smooth and delicate feel, anti-corrosion, durable
8. Size: 31 x 30 x 18mm
9. Weight: about 80g