It turned out very secure as it was a rather large screw. You can drill through the entire stock and put a stock bolt through it. Just make sure the block you mill in the back of the receiver is strong enough. All I used was a grinder, a good file, and a drill press. If I was going to do it again I would simply remove the recoil pad and drill the hole through the stock and put a stock bolt through it. That, with the screw through the upper tang will hold it very securely.