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Universal Sight Base Cutter is designed specifically for sights with a 60° shoulder and a 3/8" base. This cutter is able to cut most standard front and rear rifle sights as well as 1911 Auto low-mount, adjustable sights such as E.E.A. Super Sights, Millett and current Bo-Mar.

The cutter is slightly undersized at .359", which means that two cutting passes are required to compensate for factory variations in sight manufacture and milling tolerances. It is designed with proper relief for maximum strength and clean cutting.

It is important to note that the Universal Sight Base Cutter is for use in milling machines only. It measures 2" (5cm) long and has a 3⁄8" (9.5mm) diameter shank with a 60° shoulder. It is crucial not to exceed 700 rpm when using this cutter, as higher speeds will result in tooth breakage.