The kryptonite new york lock is a maximum security d lock crafted from impenetrable kryptonium steel rendering it resistant to bolt cutters and leverage attacks this d lock has been designed with the latest patented innovations from kryptonite the kryptonite new york std nyl lock with flexframe bracket mounting system allows for 360 degree rotation providing the ability to micro adjust the lock angle to better fit and align with a bike frames specific geometry kryptonite new york std