NcStar's Universal Pistol Rear Sight Tool designed for the removal, installation and adjusting windage of dovetailed rear sights for most semi-auto pistol slides. Its base platform is adjustable for height, to get your slide and rear sights at the proper height for the rear sight pusher. Includes one bottom spacer for some pocket pistol slides for proper height alignment. The multiple vertical and horizontal clamps are to secure various sizes and types of semi-auto slides in the tool and the adjustable side braces with plastic inserts are to secure the slides horizontal placement on the base platform. Each includes two sets of side plastic inserts: a pair of flat inserts and a pair of stepped inserts to fit a wide variety of slide profiles. This sight tool frame can be bolted or clamped onto work surface.