RESET AND CONVENIENCE: Use code lock instead of key, no need to worry about lost/remember to unlock with key. Easy to use, set a password. SMALL AND LIGHTWEIGHT: It is small and can fit in the pocket of a cycling jersey or backpack. ALLOY LOCK BODY: The bicycle lock body is made of zinc alloy, and the outer PVC material is wrapped to prevent scratches on the bicycle frame, wear-resistant and durable. ELASTICITY AND FLEXIBILITY: The helmet lock can be stretched to 90cm, which is very suitable for locking the helmet on locked bicycles, motorcycles or luggage. SAFE AND DURABLE The lock body is made of zinc alloy , wrapped PVC outer material to prevent scratches on the bike frame, wear-resistant and durable. ELASTIC LOCK BODY The lock body is elastic. Suitable for most bags, bags backpacks, travel bags, snowboards, strollers, helmets, etc. Specification: Material: Zinc alloy Color red Size: 90cm (extendable) Quantity delivered: 1 piece ON Step 1: Set 000 to unlock. Step 2: Press the bottom button and hold it firmly. Step 3: Hold the button below and set the new password with another hand. Step 4: Release the button below and password setup is complete.