The 3215SM Sub-Miniature is a 2-flute, general purpose end mill designed for use in titanium, super alloys, stainless steels, steels, cast iron, brass & copper, and low si aluminum. It’s offered in a variety of configurations and is available with single-end and double-end designs. The 3215SM Sub-Miniature end mill is stocked uncoated and with TiAlN, TiCN, and TiN coatings.