Protects the chain from rust and scratches: the chain is enclosed in protective fabric sleeves to shield it from moisture and abrasion, helping maintain its condition over time. Convenient spare key option: includes 2 keys so you can use one for daily locking and keep the spare at home in case you misplace the other. Durable and secure lock head: strength metal lock head provides durability, reliable security, and antislip performance, with corrosion and rust resistance. Compact and portable: small size makes it easy to carry and store, while remaining resistant to break attempts from pulling or cutting for safer use. Practical use scenarios: Locking your bicycle at school, campus, or gym while you attend classes or workouts. Parking at a cafe, , or transit hub during short errands or commutes. Traveling or running quick errands where a lightweight, portable lock is convenient. Key attributes at a glance: Function: bicycle lock with a chain enclosed in fabric sleeves Size: small and portable Material: strength metal lock head; fabric sleeves over the chain Performance: antislip, anticorrosion, antirust, and resistance to break attempts from pulling or cutting Keys: includes 2 keys for added convenience and security