1. This is a bike lock made of materials for durable use over time. The lock is constructed with alloy material, which is resistant to breaking. Its ring-shaped design allows for convenient carrying and bike locking. 2. - Material: Zinc-alloy and PVC - Size: 13.00X10.50X2.00cm/5.11X4.13X0.79in 3. Small and portable, safe and anti-theft. 4. Convenient and fast to use. The key is designed to be cumbersome and complex, making it difficult to copy, which contributes to security and anti-theft performance. 5. Zinc alloy material offers strength and durability, along with safety, anti-theft properties, corrosion resistance, and rust resistance. 6. Equipped with a steel cable for enhanced safety, providing strong anti-shear and anti-theft capabilities. 7. Features an anti-theft lock core with a high safety factor. The lock body is wrapped in integrated PVC, ensuring a comfortable hand feel and long service life, while effectively helping to prevent scratching of the bike frame. 8. Packing list: 1 x ring lock, 2 x key