ROCKBROS Hardened Chain Bike Lock

Built with genuine, durable materials, this anti-theft chain lock is designed to protect your bike wherever you ride. Suitable for multiple everyday scenarios—from city commuting and quick stops to parking at home, school, or public bike racks—the protective outer sleeve helps prevent scratches while providing dependable security. A practical solution that keeps your bike safe across different riding environments. Features Waterproof Dust Cover – Built-in cover blocks rain and debris, reducing corrosion and extending lock life. 8mm Hardened Solid Chain – Thick, heat-treated chain resists cutting and forced damage. Wear-Resistant Nylon Sleeve – Protects your bike frame while preventing noise and slippage. High-Security Brass Lock Core – Eight brass pins with precision keyway reduce duplication risk. Key-Free Locking – Lock instantly without a key for faster, everyday convenience.