OnGuard BullDog series u-locks feature X2P Double Bolt lock mechanisms and strong 13mm (0.51 inches) hardened steel shackles for a full circle of protection.

• Hardened ultra steel shackle with reinforced sleeve over crossbar and cylinder for added security
• Bulldog includes free 1-year, anti-theft guarantee
• 4.6 Tons pull strength with anti-drill and pick resistance
• 11mm hardened ultra steel shackle