Features: Security Design - The chain lock is constructed with alloy steel inner body for durability, fine quality plastic ABS and PVC protecting the collar and dials, and practical nylon covered for resistance and dust-proof. Anti-theft safe and Keyless design makes thieves have no way to start. Simple Operation - Set your own five-digit combination by turning the chain lock collar as the user manual, it is up to 100,000 possible codes to set. Multiple Use - Fine for lock bike or bicycle, motorcycle, gates and fences, boxes. Portability - Easy to carry without keys, extension cable length is 35" (900 mm), it could lock something within 17.5" (450 mm). Specifications: Color: grey, red (optional) Length: 0.9m, 1.2m (optional) Material: ABS Item weight: 560g / 1.2lb 740g / 1.6lb Package size: 200 * 150 * 100mm / 7.9 * 5.9 * 3.9in Package weight: 580g / 1.3lb 760g / 1.7lb Packing List: 1 * Bike Chain Lock