... 2)Cutting tool,metal material 3)Material:HSS ,carbide Carbide straight shank twist dril bit, carbide drill, solide carbide drill, carbide drill ... types of cutting & milling tools: Carbide End Mill, Ball & Nose End Mill, Corner Radius End Mill, Roughing End Mill, Drill Bits, Twist Drill, Center ... up to HRC70 degree.7) Less cutting resistance.8) Size standard or as per your requirements, 2/4/6/8 flutes ...