1.Tungsten steel ultrafine particles 0.6um, 90% tungsten, cobalt 10%. 2.Coated with high-quality TIALN. 1.WORK MATERIALcarbon steel/alloy steelalloy steel/tool steelhardened steelcopperaluminumstainless steelcastiron S45C,S50C,SCMS45C,SKT,SKDSKT,SKD -SUS304FC/FCD HRC<20HRC<20-30HRC<45-55 - - - 2.HRA92,HRC45°3.ECORNOMY TYPE GDK 3-100 Carbide End Mills