... use 3.We supply the competitive price and good service end mill1.Carbide square 4 flute2.Composition: 88% Wc, 12% Co3 ... of friction, and improve the tools life much.10.Each end mill is inspected by Zoller measuring and inspected machine.11 ... steel, tooling steel, mould steel, heattreament steel. Aluminum alloy steel, Non ferrous alloy. end mill