0ur opinion:

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The Brute Series U-locks offer bicycle and power sports enthusiasts maximum security for high crime areas. Massive 16.8mm ultra hardened steel shackles laugh at bolt cutters and pry bars. 0ur Quattro lock mechanism with Dual LockDown protection pins both ends of the shackle creating a double lock that can withstand up to 10 tons of pull force! And a newly redesigned M-Cylinder lock is easier to use and provides more security than ever. User-friendly features include rubber and vinyl coatings to protect your bike's finish, 4 laser cut keys plus one TorchKey for night use. And every Brute Series U-lock is backed by a solid anti-theft protection plan. Mounting bracket included.


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Buyer's feedback: - * Strong but Unreliable: Seized! ...
This lock is very sturdy and successfully protected my bike quite well; a few times overnight in bad areas of NJ. However, after 3 years of heavy use it has become incredibly difficult to open. It requires a surgeon-like finesse to get the key to turn. Or, at least it used to. Now, it doesn't open at all. After lubricating with graphite, pounding with a hammer to loosen any stuck interior components and paying a locksmith to try to open it, the lock is still seized on my bike and my primary mode of transportation is disabled. There are numerous reports of OnGuard locks seizing on the internet, so my case is not isolated. My recommendation is to look to other brands for high-end u-locks.

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Buyer's feedback: - Only crazy people would try to bust this
It is heavy duty, and I would commend anyone that was able to steal my bike when it is locked up with this. If you are worried about security, this is the way to go. If you want something compact and light, this is the wrong lock to buy. I park on a college campus everyday, and I have absolutely no fear when I lock my bike up and go to class. I love the lock, and would purchase it again. It comes with 5 keys, and locks very smoothly. I definitely recommend this lock.

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Buyer's feedback: - * Solid Lock ...
It's a super sturdy lock that someone would have to be crazy to attempt to defeat. I don't give it five stars because The short length of the shaft sometimes makes it a pain to attach it to bike racks, but with enough creativity, I've never had to leave my bike unlocked. OnGuard does offer the Brute in a Long Shaft version (LS 5000), but for some reason the updated version doesn't include a theft guarantee for bicycles, only motor vehicles. The picture Amazon shows is for last year's model, so maybe you can still get a long shaft with the guarantee. If not, go for the standard length, it's a "don't mess with me" lock.