The ultimate kryptonite u lock for power sports and cyclespassed following tests ffmc and classe sra18 mm hardened kryptonium steel shackle resists bolt cutters and leverage attackshighest security pick safe anti pick and drill resistant disc style cylinderhardened steel sleeve over crossbar provides double security protectionintegrated sliding dustcover protects cylinderdouble deadbolt locking mechanism for extensive holding powercentre keyway location deters leverage attacksu lock dimensions