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Review title: Strong but Unreliable: Seized!
Product review: 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.
