The Kryptonite New York STD (DD) U-Lock is Kryptonite&&';;s highest-security U-lock, built for riders who need maximum protection in high-theft areas. Featuring a 16mm hardened MAX-Performance steel shackle, this lock resists bolt cutters, leverage attacks, and other theft attempts. The double deadbolt locking system provides extensive holding power, while the high-security disc-style cylinder enhances resistance against picking and drilling. Designed for convenience, the Transit Flex Frame Bracket allows for multiple mounting positions, making transportation easy. Rated 9/10 on Kryptonite&&';;s security scale, this lock is a trusted choice for urban cyclists, couriers, and commuters who demand the best protection. Features: 16mm hardened MAX-Performance steel shackle resists bolt cutters and leverage attacks Double deadbolt locking design for maximum holding power High-security disc-style cylinder prevents picking and drilling Transit Flex Frame Bracket for easy transport and mounting versatility Key Safe Program for key replacement if lost Security Rating: 9/10, ideal for high-theft areas Dimensions: 4" (101mm) x 8" (203mm) Durable yellow finish for high visibility