Features: 1. High-quality alloy steel lock head, enlarged diameter, strong anti-strike ability. 2. Pure copper lock cylinder, don’t deform and stuck, and the anti-theft performance is great. 3. High-strength and high-toughness steel wire, strong and durable, hard to cut out, strong safety performance. 4. Environmentally friendly PVC shell, wear-resistant, and corrosion-resistant, effectively protect internal steel wire. 5. The dust cover of the lock head is designed to prevent foreign matter and water from entering, effectively extending the service life. 6. Three keys, one has a light for dark lighting.