Resettable & Convenience -- ROCKBROS bike lock adopts combination for lock instead of key, no worries about losing/remembering-to-bring key for unlocking. Easy to use and easy to set the password

Portable & Lightweight -- Small enough to fit in the pocket of cycling jersey or bag, only 50 grams weight so you can can carry it anywhere

Alloy Lock Body -- The bike lock body is made of zinc alloy, outer PVC material wrapped to prevent scratching of the bike frame, wear-resistant and durable

Elasticity and Flexibility -- The helmet lock can be stretched to 90cm/35.4in, which is very suitable for locking the helmet on bicycles, motorcycles or locking luggage

After-sale Service -- Please note that this lock won’t deter someone with cutting tools, it will slow down the average grab and go theft. Feel free to contact us if you have any questions