Unmatched Protection Built with a durable lock body material that resists shearing and drilling. This combination bike lock uses a 4digit password mechanism with more than 10,000 possible combinations to guard your bicycle from theft. Peace of Mind Ensured Provides strong security with a 0.24 inch alloy steel chain and a zinc alloy lock core. It resists drilling and technical unlocking, helping keep your bike safe in risk areas. The sturdy design delivers reliable, worry protection. Enhanced Durability Protects the lock from rust and scratches with a thick nylon textile fabric cover. The cover is wearresistant and heatresistant, helping to prolong the lock's service life when used on bike racks and in varying conditions. Convenient to Use Securely fasten bikes, scooters, and more with a 3.9 feet digital password chain lock. Preset with 0000, it adapts to a range of items, including the ability to lock multiple bikes or a motorcycle. Use scenarios Urban and campus parking: Ideal for securing a bicycle in crowded city racks, at schools, or in public spaces where theft risk is higher. Shared or home parking: Suitable for locking bikes, scooters, and other gear in apartment complexes, dorms, or garages, including situations that require protecting multiple items with one lock. Travel and commuting: Useful during trips or daily commutes to protect bicycles, scooters, or motorcycles at transit hubs, stations, and busy stops.