diamond grinding disc: 1.Size:100mm 2.Hole size:16mm,20mm 3.Usage:cut and polish ... ,marble,glass,concrete,ceramic diamond grinding disc1.Dimensions:1) Diameter: 100mm;2)Thickness:0.8-1.0mm available;3) Hole size ... ,20mm,special hole size is accepted.2. Diamond grit: 40 - 120 available.3. Coating: nickel, chrome, titanium available. 4.Smooth cutting ...