Special groove design of the key makes it not easy to copy. Zinc alloy material makes the lock head anti-rust and corrosion resistant.Waterproof and bold design makes it durable and long lasting to use. Lightweight and compact design makes it easy to store and carry with you.Made of high quality zinc alloy, aluminum alloy and PVC material, it is durable.We have different styles for you to choose.It is suitable for bike. No key is required to lock it with one press, and it can be locked with a light press.Item Name: Bike LockMaterial: PVC,Aluminum Alloy,Zinc AlloyColors: Black, Blue, Green, Dark OrangeFeatures: High Hardness, Ring Shape, Anti RustSize Details: Wire Diameter: 12mm/0.47" (Approx.)Upgrade Size: 175mm x 150mm x 27mm/6.89" x 5.91" x 1.06" (Approx.)Normal Size: 146mm x 120mm x 25mm/5.75" x 4.72" x 0.98" (Approx.)Notes:Due to the light and screen setting difference, the item's color may be slightly different from the pictures.Please allow slight dimension difference due to different manual measurement.Package Includes:1 x Bike Lock2 x Keys