ABUS' U-locks offer strength, durability and protection you can count on. The Granit X-Plus 540 U-Lock boasts a burly, 13-mm thick, 9-inch long parabolic steel shackle and an impressively tough lock body to keep your bike safe and sound. The double bolted ABUS X-Plus lock cylinder is highly tamper resistant, and it's a snap to carry the Granit X-Plus 54 on your bike with the included bracket. This lock comes with two keys, one of which features an LED light while the keyhole features an automatic cover to protect the lock against dirt and corrosion.