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Title: tough!
Review: I bought this to lock up some stuff outdoors in a low-crime area. The crimes in my area are generally "crimes of opportunity" and I wanted to get a heavy duty lock for peace of mind, but I didn't want to spend $100+. I chose this after looking at several locks including the maximum protection Kryptonite ones. Pictures don't do this chain lock justice -- it's HUGE. The actual lock itself looks like it could withstand a small bomb. I don't think anyone is going to get through this with any kind of bolt cutters. I think just the sight and weight (10lbs!) of the lock is enough to deter everyone (except the real hardcore thieves).The 5021 has the advantage of an extra 2-3 feet over the 5020, which is great if you want to lock something that can't be moved. I have experienced no problems locking or unlocking this. The 5 keys are nice to have in case you lose one.Overall, I'm glad I went with this one. It's a great lock at a great price.
