Universal pistol front & rear sight pusher tool is for: removal, installation, and the adjustment of the front & rear sights for most semi-auto pistol slides. Two separate sight pusher blocks, each pusher isspecifically designed for either front or rear dovetail sights. Pusher blocks are made from tool steel Base platform is adjustable for height to properly align your sights at the proper height for the sight pusher blocks. The adjustable side and top clamps secure the slide in place. Side witness windows on both sides of the tool frame to check for the proper sight and pusher block alignment. Sight tool frame can be bolted to, clamped onto a work surface, or clamped onto a vice. Heavy duty blue Anodized aluminum frame. Sight pusher steel screws have brass bushings for goo bearing surface characteristics and excellent strength. U.S. Pat. 9784535, D880268. Patent Pending