CNC SOLID CARBIDE END MILL,BALL NOSE BIT,ROUND BALL BIT FOR METAL,IRON,STEEL,etc CUTTING. MATERIALS:SOLID CARBIDE:10X,FX30,A308 COATING: HRC45 TiN Colour BLACK HRC55 PVT TiSiN Colour COPPER HRC60 NaNo Colour BLUE DIAMETER From 0.3mm to 20mm CUSTOMIZED SIZE availale/OEM