New York Diamond U-Lock STDDescription The Kryptonite New York Diamond Standard U Lock is engineered for riders who demand top tier bicycle security in high risk urban environments. Built around a 26 mm diamond coated double layered steel shackle, this lock stands up to angle grinder attacks and resists cutting. Its hardened double deadbolt design defends against pull and twist attacks for maximum resistance. Inside, a highest security disc style cylinder is pick and drill