... for diamond polishing tools,used for abrasive gem,resin grinding wheel,polishing diamond micro powder is the hardest ... 4-8, 5-10,6-12,8-16,10-20For Grinding : 12-22, 20-30,22-36, 36-541 ... .Diamond for grinding, lapping,2.polishing and fine finishing applications.3. ... ,5.electronic components, PCD Features 1.rough grinding 2.fine grinding 3.wear resistance 4.high purity 5.uniformly ...