Our high-security bicycle chain lock adopts high-quality material, which is cut resistant, durable, waterproof, rustproof, shatterproof and shear resistant. This product has a long lifespan. With help of the 5-digit combination chain lock, it helps to protect your precious bike from stealing. Moreover, the combination lock code can be easily reset. It is constructed of alloy steel material. There are 3 different sizes to choose from. This product is perfectly suitable for mountain bike, road bike, MTB and so on. Item Name: Bike Chain Lock Material: Alloy Steel Features: Rustproof, High Strength, Rustproof, Waterproof Size Details: A, Length: 0.8m or 31.5" (Approx.) B, Length: 1.0m or 39.37" (Approx.) C, Length: 1.2m or 47.24" (Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x Bike Chain Lock Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.