MGW's replacement pusher block drops into your MGW Sight Pro or Range Master sight mover tools to replace a worn or damaged block and keep your tool operating correctly. The MGW sight tool replacement pusher block is machined from the same high-grade steel as the rest of your mover, and given the same durable, matte black finish. Installation is a simple, fast, drop-in process. Two versions of the replacement pusher block are available: 90-degree block is the standard part used with the majority of the sights you adjust with your MGW sight mover 30-degree block is specifically for use on GlockA(R) and Hechler & Koch angled rear sights (and similar sights from Mfg: Mgw