... disc: diamond coated disc for lab,for divide,separate,fabricate,contour,shape of dental restorative materials. Figure style for e series:Edge coated ... / full coatedEdge thickness: 0.20mm, flat disc very thin 0.3mm, flat disc thinDia. general size ... wheel shapeRecemmended maximum speed:20,000rpmquality:0.2mm, flat disc very thin, distal, proximal and peripheral cutting, For ceramics ...