... ) hold good reputation in home and abroad market 45 HRC 2/4 Flutes Flat End Mill 1 Suitable for Copper,Cast Iron ... ,Carbon steel,and Mould steel processing. 2 Main features: Grain size carbon tungsten .high toughness,ALTIN coating ... use for high speed cutting of CNC milling machine.also can inclease the smoothness,reduce the rubbing coefficient, and improve the ...