I purchased one of these a bit over a year ago. I have used it to change the sights on about 75 pistols. These include XD, Kimber, Sig, M&P, and a few other "tough" guns. The tool allows you to adjust the slide position so you can get the "Pusher" blade down close to the bottom of the sight. Two warnings: be sure to cover the slide or the clamping blocks with several layers of tape, and be aware that the "pusher" blade/block is not hardened. It is machined from cold rolled steel. I've rewelded and remachined mine once. However, for the money this is a very well made tool and will move the toughest sights. I own several MGW pushers and wish I had saved my money. None of the MGW pushers will handle the front sight on guns with a longer recoil spring dust cover such as 1911, 5" XD, 5" &P, etc.