Kryptonite Keeper U-Lock - 4 x 8", Keyed, Black, Includes bracket

This lock features a hardened steel shackle that resists hand tools for security in low crime areas. 2 keys - high security, disc-style cylinder Patented Anti-Rotation Double Deadbolt shackle helps fight against twist and cut attacks Includes click style transportation bracket Protective vinyl covering 12mm hardened performance steel shackle Patented Anti-Rotation Double Deadbolt shackle helps fight against twist and cut attacks