Diamond grinding wheels that contain higher grade and higher concentration diamond grit than common in-market wheels. These wheels achieve aggressive grinding and fast stock removal on curb gutters, expansion joints, high spots, epoxy, paint, mastics or coating removal. Specifications: HIGH QUALITY DIAMONDS - contains higher grade and higher concentration of diamond grit than standard grinding wheels DIAMETER SIZE - 7 inch diameter GRIT SIZE - #30/40 grit NUMBER OF SEGMENTS - 14 "T" segments ARBOR SIZE - 5/8"-11 threaded arbor GRINDING METHOD - use wet or dry EQUIPMENT TYPE - recommended to use with angle grinders