1) Co:10-12% 2) Grain size: 0.5-0.6um 3) DIN or ANSI standard .. 4) ISO9001:2000. 5) Coated or not coated cemented carbide reamer (straight shank,left rotary, right cutting)just use for through holemachine reamer,tungsten carbide reamers, carbide reamersWC=90%, Co=10%, TRS>3800N/mm2; Hardness>91.8HRA, Grain size: 0.5,0.6,0.8um; High qulaity of wearability and impact We can supply you different ...