The OnGuard Bulldog LS U-Lock features the X2P Double Bolt Locking Mechanism, which locks the shackle on both sides for best-in-class protection. Its long shackle provides more locking options, making it ideal for securing your bike in medium crime areas. The 11-13mm hardened steel shackle resists cutting, prying, and jacking, while the Z-Cylinder is bump-proof and resists picking, pulling, and drilling. The rounded design with a centered keyway eliminates pry points, and the double rubber-coated crossbar cover protects your bike's finish. The extra thick molded end caps offer additional protection against bumps and hits. The lock includes 5 laser-cut keys, 1 with a micro-LED, and an all-tube mounting bracket.