The Kryptonite Chain Lock is the best one on the market you can get. Its tougher than anything else and I can tell you they didn't cut it unless they had a pair of hydraulic cutters out in the woods. Tell me what kind of lock or take a pic of it and I'll tell you if it can be picked or not. They are only a handful of locks that can't be picked. If it doesn't say Medeco, Multilock, Primus, or ASSA then most likely it can be picked. Get the Kryptonite lock that has the loop on both ends a buy a Medeco Padlock from a local locksmith with the hidden shackle and you will have nothing to worry about.