Well , I really knew you were serious, but they are so prone to breaking, I would fear to hit them. I usually soak them with PB Blater for a couple of days ahead.I also will hit a phillips or a bolt straight on to " shock" it, with the driver or socket in place, it does work well, or even try to give it a jolt in the tightening direction to.Alot of the bikes I work on are from the early 20's to 30's , takes alot of patience to get some fastners out.I have trouble getting sockets/wrenches for the BSF applications. ( British fine thread).