0ur opinion:

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Massive, 13mm hardened ultra steel shackle provides maximum cut resistance. Dual Steel Bar locking mechanism delivers up to 10 tons of pull strength while the M-Cylinder technology puts drillers and lock pickers out of business. Rough and tumble Ballistic plastic withstands mistreatment while protecting your bike's finish. lncludes All Tube, multi-position, QR mounting bracket and 4 laser cut keys with 1 light key for use at night. Vinyl covered and weatherproof. Dimensions: 4.5' x 11.5'.


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Piece Availability: Usually ships in 24 hours

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Buyer's feedback: - * Lock jammed after a month and a half ...
I bought the onguard U lock after a thief cut my cable lock and made off with my brand new bike. It is heavy, but easy to use. I was very happy with it for a month and a half until one day I tried to unlock it and it no longer worked. Key only goes in half way. Luckily it was not on my bike at the time.

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Buyer's feedback: - a big and secure U-lock
I think this U-lock is more secure than most of the U-locks I have seen around campus. When my last bycicle was stolen two months ago I start to think about the methods thief use to steal bycicles and I just think we (users) sometimes are silly, we buy skiny locks to protect our stuff and they can easily be broken, we also secure the bycicle to fragile fences or mesh... so the lock is ok but the thief can break also the fence right?!
Please buy a good U-lock and be wise in the proper use of it!
This is a good lock, thick and with a key system not easy to break, it also come with 5 keys and a code you can use to request copies if you lost the keys, it is a little heavy and big so I dont recommend it for small bycicles.

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Buyer's feedback: - * Solid security ...
This Bulldog lock is solid as a rock and virtually bulletproof. The only drawback I noted is the clip attachment for carrying the lock on your bike: Attaching is not too easy, and the weight of the lock (good) adds to your overall bike weight (bad). I'd just leave it locked up at home base and forget the carrier...

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Buyer's feedback: - Strong but heavy lock.
Lock is very sturdy and has quality steel construction. However it is a little long so if you have a small frame, chances are you won't be able to hook it onto the top tube. Since it is so long this also makes the lock very heavy. The locking mechanism jammed about a month and half after using it. However, Onguard's customer service was very good and they promptly sent me a new one after sending defective one back. Overall, a durable lock for the everyday bicycle commuter.

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Buyer's feedback: - * Decent Lock ...
The Lock is a bit heavy, and its pretty long. It seems sturdy and safe, but I don't know whether someone tried to break through it, so I can't say. I wish I paid a bit more for the smaller OnGuard Lock, probably easier to carry.