... by worldwide tool makers.Advantages:1.For PCB drills, drills, end mills & reamers, mold punches, core pins & hole drilling ... .R.SMPαHardnessHRA Performance & application recommendedMB615.0912600 For turning, milling, reaming and plaining gray cast iron, light metals, plastics, ... Comprehensive performance and good stability, for twist drill and end mill, is preferred alloy tool materials.If you are ...