We’ve had many requests for a small dovetail cutter that would speed up the cutting of dovetails in front sight blades when installing colored inserts. The one we’ve had made cuts a 1⁄4' wide dovetail, just right for sight inserts, and the finished product is very precise. Since the cutter is small, (it tapers to a diameter of .110'), you must make an initial cut with a 1⁄8' end mill (listed below). By using the end mill to remove some metal first, you'll avoid overloading the cutter and breaking it. CAUTION: For use in milling machine only. Solid carbide 2' (5cm) long. 1⁄4' (6.3cm) diameter shank. 60° shoulder.