This 1/8" diameter solid carbide end mill is made from premium grade sub-micrograin carbide material.This end mill is ALTiN coated and 4 flute center cutting. ALTIN coating is a high performance coating for milling stainless steels, carbon steels, alloy steels, titanium and cast iron. This coating is extremely heat resistant and can be used with or without coolant. It is exceptional in difficult to machine materials where adhesive wear is particularly high.