1.[Security Design]: With a diameter of 0.18 inches lock body, helmet lock has high strength and high tenacity for strong anti - cutting . The whole-body PVC coating can effectively prevent scratches. 2.[High Scalability and Reinforced Steel Cable]: The lock chain is highly stretchable and can be stretched up to 60 inches, you can use it ly. The reinforced steel cable provides excellent anti-cutting and anti-theft performance for this lock. 3.[Perfect Dailly Tool]: This little cable lock can be used to lock helmets, bicycle wheels, strollers, luggages, doors, ladders and any other things you want. 4.[]:The little helmet lock has a 4 digit code, very easy to set your desired code by turning the lock collar as the user manual, quick to secure and remove, easy to customize combination. (Tips: Take a photo to avoid forgetting the password. If you receive the lock that cannot be opened or cannot be opened after changing your password, please email us to help solve it.) Note: 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.