I had some badly rusted screws in an old receiver, and they were just not coming out. The heads were too rusted to grab, and the screws were in tight, from the rust. These extractor work great. I had never done anything like this before, but me and my trusted Milwaukee drill were up for it. It took me a while to drill the hole, the rusted part came off in a few seconds, but the hard metal core took a bit to get deep enough. Stay straight, and don't force it, and it will get through. Then po...