Real Avid Master Sight Pusher tool for adjusting, installing, and removing a variety of front and rear dovetail sights. Works with most modern handguns, including Glock, H&K, S&W, and Sig, as well as with 1911 style sights & slide profiles. Used only once to swap a single set of sights and in perfect condition. Link to manufacturer's description below.
https://www.realavid.com/product/master-sight-pusher/