... tungsten .high toughness,Tialn coating,high wear-risistance,special use for high speed cutting of CNC milling machine.also ... the lathe efficiency ,save more production timeTungsten Carbide Ball Nose Milling CutterTungsten Carbide Ball Nose Milling Cutters1 Suitable for Copper, ... tungsten .high toughness,Tialn coating,high wear-risistance,special use for high speed cutting of CNC milling machine.also ...