Explanation: Adopting a digital lock, no key required, easy to use.The five digit password can be combined into tens of thousands of results at will, and it is compact and convenient to carry. It is wrapped with thickened steel cables and high-strength composite steel wires, which are sturdy and durable, and can prevent the lock from being opened by force, such as using a saw or hammer. This product is made of zinc alloy, ABS, PVC, and iron, and is durable. The product comes in two sizes to choose from. Suitable for bicycles, electric vehicles, and motorcycles. Product Name: Bicycle Lock Material: Iron, PVC, ABS, Zinc Alloy Features: Stability, rust prevention, antioxidant Color: Yellow, red, black Size Details: Extended Size: 57 cm x 1.72 cm/22.44 inches x 0.68 inches (approximately) Mini Size: 40 cm x 1.72 cm/15.75 inches x 0.68 inches (approximately)