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So, the best way to use a lock like that would be to pick a non word sequence. And regardless of the combinations these locks and all their derivatives are very easily opened even if you don't know the combination.



I once destructively opened a friend's U-Lock in about 60 seconds. (The key broke, didn't have copy.)

I took a 10 dollar hack saw and sawed through the main bar of the lock (not the U).

It was like a hot knife through butter.




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