Security Design - High quality metallic helmet lock with a PVC coating to a diameter of 0.182 inch (4.6 mm). The coating helps prevent scratches on your helmet and provides a simple anti-theft deterrent. Easy to Use - 4-digit code unlocks the mechanism. Set or change your desired code by turning the lock collar according to the user manual. - Quick to secure and remove, with a customizable combination for your convenience. - Tip: taking a photo of your code can help you avoid forgetting it. Compact and Portable - Lightweight and compact design means it is not bulky, yet it remains sturdy. - Easy to carry in a pocket and take with you anywhere. - Suitable as a handy little helmet lock, and also convenient for temporarily locking strollers and suitcases. Retractable Cable Lock - Cable extends up to 59 inches (150 cm) for flexible use. - When not in use, you can wrap the lock and helmet together around a motorcycle or bicycle with the extended cable. - Simple coiled structure provides the needed reach for various setups. Use scenarios - Park your motorcycle or bicycle and secure your helmet by wrapping the lock and helmet around a frame, rack, or secure point to deter theft. - Temporarily lock a stroller or suitcase in public spaces to reduce risk of theft or accidental movement. - Carry the lock in your pocket and use it on the go for quick helmet security when you’re away from home.