RESET & 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. It weighs only 50 grams , so you can take it with you.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 bicycles, motorcycles or locked luggage.AFTER-SALES SERVICE: Please note that this lock will not interfere with the person using the cutting tool, it will slow down the usual grabbing speed and be stolen. If you have any questions, do not hesitate to contact us.