OnGuard Bulldog Key U-Lock 90 x 240mm

The top - selling Bulldog series u - locks are a must - have for bike security. They come with top - notch features to safeguard your bike. The X2P Double Bolt Locking Mechanism secures the shackle on both sides. The Z - Cylinder is resistant to bumping, picking, pulling, and drilling. The 11 - 13mm thick hardened steel shackle stands up well against cutting, prying, and jacking. Its rounded design and centered keyway remove potential pry points. The double - rubber - coated crossbar cover shields your bike's paint and finish. Extra - thick molded endcaps protect from bumps and hits. It comes with 5 laser - cut keys and 1 micro - LED. An all - tube mounting bracket is also included.

Using your OnGuard Bulldog U - lock is easy. First, find a sturdy object like a bike rack to lock your bike to. Insert the shackle through your bike's frame and the rack, then use one of the 5 laser - cut keys to lock it. The key has a centered keyway for easy insertion. The micro - LED can be handy in low - light situations. When not in use, you can attach the lock to your bike using the all - tube mounting bracket. As for maintenance, keep the lock dry and clean. Avoid exposing it to extreme temperatures. If the lock seems stiff, you can use a little graphite powder to lubricate the keyway. And remember, don't try to force the key if it doesn't turn smoothly.