Master Lock Street Flexium 900mm Integrated Combination Chain Lock, Red. Universal lock for all types of bikes: road, mountain, folding, electric, indoor and outdoor use. Features a hardened steel chain that resists cutting, sawing, and prying. Offers 4-dial set-your-own combination security for keyless convenience. The nylon cover on the chain prevents scratching and is red for easy identification. Chain dimensions are 90cm in length and 0.8cm in diameter. Comes with a Limited Lifetime Warranty.