Works fantastic for sigs - Wheeler Engineering Fine Gunsmith Equipment Armorer's Handgun Sight Tool

It's cheaper than when I bought it, but this is the pretty easy and works great for 1911s, Sig, etc, with pressed sights. You need to masking tape your slide, read the instructions 3 times and then be patient learning to set up your slide and adjust just right. After the first time, it's really easy and obvious for the next time. I paid to have mine installed, by an idiot I now know, with a crappy universal tool. Ruined my sights, scratched my pistol and all I got was sorry. I consider myself only half an idiot and I managed without destroying anything. Once you understand how to use it, you can actually make extra cash installing a few to pay for the tool. They usually install from right to left in my experience. I didn't have to sand or file to get them started.