Like I mentioned, my security needs are in an RV park, many of them gated, not much worry there. A lock only keeps an honest person honest. If I was going to NYC, that lock would not even be a consideration. I am not going to be carrying 3 locks to go riding on park trails, then come back to the RV Park. Others needs maybe totally different, mine are not and mentioned in the post. Nothing wrong with better locks.The manufacturer blurb about shackle thickness is: "The bike lock with thickness(including rubber casing):14mm,250mm x 150mm U shack to lock and go!" INCLUDING RUBBER CASING!!! I've never heard of a lock referred to that way and I take it as a warning about the quality.
Also, if you look at the pictures posted by reviewers that say the lock saved their bike, they're phony pictures. No thief worth his salt attacks a u-bolt lock with a hacksaw or sawzall.
There's some good locks here: https://thewirecutter.com/reviews/best-bike-lock/
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