... 4 Flexural strength :4000 Micro -Diameter Flat End Mill And Ball Nose End Mill Grain Size :05 um10.8% ... Suitable for Copper,Cast Iron,Carbon steel,and Mould steel processing.Stainless steel,Titanium Alloy ,Tool steel ,and Heat-treated steel processing 2 Main features: Grain ... .also can inclease the smoothness,reduce the rubbing coefficient, and improve the lathe efficiency ,save more production time If ...