BullDog Series U-Lock - 5 x 9, Keyed, Black/Yellow, Includes bracket

The OnGuard Bulldog series u-locks offer top - notch protection. They come with X2P Double Bolt lock mechanisms and a 13mm (0.51”) hardened steel shackle, ensuring a full - circle defense. Here are the great features: You get a free 1 - year anti - theft guarantee. It has a 4.6 - ton pull strength and resists drilling and picking. The hardened ultra - steel shackle has a reinforced sleeve over the crossbar and cylinder for extra security. The shackle is 13mm thick. Specs include a length of 9 inches, a diameter of 13mm, no included cable, a shackle width of 5 inches, a keyed lock style, and an advertised weight of 2.915 lbs.

Using your OnGuard Bulldog series u - lock is easy. First, find a secure object like a bike rack. Insert the shackle through your bike's frame and the rack, then lock it with the key. When you're done, unlock it and remove the shackle. Keep in mind that this lock is very strong, but don't expose it to extreme forces or try to force it open. To maintain it, keep it dry. If it gets wet, dry it off as soon as possible. Also, you can use a little bit of lubricant on the keyhole occasionally to keep it working smoothly. Enjoy the peace of mind that comes with the 1 - year anti - theft guarantee.