... , precision grinding and internal grinding ceramics, glass, tiles stone Diamond Mounted Points Bits for carving tombstone letters CNC Stone tools Supply all ... : 1. Tools Shank: 6mm,8mm,10mm,12mm,16mm… 2.Cel(diamond part length) :12mm,20mm,30mm,40mm,50mm,60mm,70mm,80mm ... are very importance for CNC Stone Tools life.(3).Please set right tools parameters in softwares. Shank? Cel? Ced? Degree? Tip ...