https://www.stonediamondtool.com/productsView-STI_Two_Rhombus_segment_diamond_grinding_disc-1726.html
STI Two Rhombus segment diamond grinding discDiamond Grinding Wheels & Cupwheels
Products describtion: STI Two Rhombus segment diamond grinding disc Grit: 30-400# Bond: Soft-medium-hard Segs No: 2 Fitted in: STI G
diamond grindingstitworhombussegment