OnGuard Combo BullDog U-Lock

Same level of security as OnGuard's Bulldog keyed U-Locks, but with the convenience of not having to keep track of a key. Simply use the built-in 4-digit combination dial to lock and unlock. Set your own preferred combination on the steel Ball Combo gear system. This lock features X2P double-bolt locking mechanism, which locks the shackle on both sides. The hardened steel shackle is 13mm thick to resist cutting, prying, and jacking. There's a double rubber-coated cover to protect your eBike's paint and finish too. includes mounting bracket Shackle is 4.5 x 9"