GR heavy cutter series is suitable for processing HRC≤68°steel parts, ultra-high hardness die steel, special tools for quenching materials, special treatment of cutting edges, special cutting and helix angle, and high speed processing of workpieces with low hardness Milling, high speed, high feed, large tool capacity, using Sumitomo special grades, OSG special coating or Balzas special coating, the use efficiency is greatly improved, this tool provides material certification!