10-inch outside diameter, quality electroplated diamond coated flat lap disk wheel. The flat laps wheels have a 1/2-inch arbor hole for Angle Grinder. They are absolutely flat and parallel to meet the most exacting faceting requirements. For grinding and polishing jewelry, glass, rock,stone, granite,etc. Recommended for rough and fine grinding on faceting material plus general lapidary grinding when precision is required. Specification: Material: Metal & Diamond Coated Thickness: 1.5mm/0.06" Arbor Hole Diameter: 12.7mm/1/2" Outer Diameter: 250mm/10" Grit: 60/80/100/120/150/180/240/260/320/400/500/600/800/1000/1200/1500/1800/2000/2500 Package Content: 1x Diamond Disc WARNING: This product can expose you to Lead, which is known to the State of California to cause cancer. For more information go to www.P65warnings.ca.gov.