Special Feature Key Release Lock Type Key Lock Material Steel Recommended uses for the product Bike Style Key Lock Color Smooth. Number of Pieces 1 Shape Semicircular Item Weight 1, 26 Kilograms See more About this item Robust and anti-cut: the robust U-lock for bicycles is made of hardened steel high performance that withstands 12 ton cuts, bolt cutters, it is also crush and burglar proof. Anti-scratch and waterproof: silica gel coating to protect the D-lock and protect your bike from scratches; and it is also waterproof, no risk of rust. Increased protection: 1. The mounting bracket is very easy to install on the seat post, so you can easily carry the lock anywhere. 2. With 1.2m high quality steel flexible cable (Note: only assist lock, only U-lock is anti-cut. We suggest you lock your wheel). With 2 pure copper keys: Class C lock core and complex serpentine key slot against different means effectively.