It is a CNC Mill Bits/2 Flute Ball nose End Mill/Drill Bit/CNC Router Bits. Shape: spiral with 2 flutes. Material: tungsten carbide with TiAlN coating. Application: It is mainly suitable for milling materials from soft Plastics to tough Aerospace Alloys including Aluminum, Cast Iton, Carbon Steel, Tool Steel, Stainless Steel, Mold and Alloy Steels.