Bike lock: durable and practical construction with a strong build to resist breakage in everyday use. Bike helmet lock: compatible with all fullface and halfface helmets, and suitable for all bike types. Luggage lock: the tough selfcoiling cable is 12 meters long, allowing you to lock your luggage as well as your helmet to your bike. General compatibility: suitable for standard bicycles, mountain bikes, motorcycles, and scooters. Use scenarios Urban stop: park your bike and secure your helmet to the bike using the helmet lock while you run a nearby errand. Transit hub: at stations or stops, use the 12 meter cable to lock your luggage and helmet to the bike, reducing fatigue during longer trips. Travel and errands: on weekend rides or longer trips, keep your gear secured by locking both helmet and luggage to the bike, ensuring everything stays with you.