BullDog Series U-Lock - 3.5 x 5.5, Includes bracket

The OnGuard BullDog series u-locks are a top - choice for reliable protection. They come with X2P Double Bolt lock mechanisms and a tough 13mm (0.51”) hardened steel shackle. With a 1 - year anti - theft guarantee, these u - locks have an impressive 4.6 ton pull strength and resist drilling and picking. The ultra - steel shackle has a sleeve over the crossbar and cylinder for added security. Specs: - Length: 5.5 ins - Diameter: 13 mm - Cable Included: No - Shackle Width: 3.55 ins - Lock Style: Keyed - Advertised Weight: 2.3 lbs

Using your OnGuard BullDog series u - lock is easy. First, find a solid object like a bike rack to loop the u - shaped shackle through. Then, insert the key and turn it to lock. To unlock, just insert the key again and turn it in the opposite direction. Here are some important notes. Keep the key in a safe place to avoid losing it. Don't try to force the lock open with excessive force as it can damage the lock. When it comes to maintenance, it's a good idea to keep the lock dry. If it gets wet, dry it off as soon as possible to prevent rust. Also, you can apply a small amount of lubricant to the keyhole every few months to ensure smooth operation.