Angle 30 degree 60# shank 6mm 12mm-30mm Grinding Head Diamond Grinding burr Emery grinding bits for diamond stone raw materials
https://www.vogueparade.com/shopping/EN/1428/1/1005001664358356/angle-30-degree-60-shank-6mm-12mm-30mm-grinding-head-diamond-grinding-burr-emery-grinding-bits-for-diamond-stone-raw-materials//