Taking a bit of a side trip from our usual information about online security, here is a video from YouTube’s LockPickingLawyer which shows his choice of the top 10 “biggest and baddest” padlocks.
View some of his other videos to see just how easily someone can break into most of the standard, run of the mill padlocks.
I haven’t looked, but I’m willing to bet all of these are relatively expensive. But if you really want to lock something down, you might want to consider getting a quality padlock.