Re: Where did you get that $20 padlock?
Just rap the lock (as it's phrased) and the pawls bounce open on masterlocks and similar, hence it is wise to use something which uses ball bearings to secure the hasp
Shimming tends to be irritating and sometimes they even make one that fits together proper properly.
For chinese built locks usually the locking mechanism isn't protected so a 'knife' can be shoved up through the key way and used to unlatch the catches.