6-inch outside diameter,320 and 500 Grits, quality electroplated diamond coated flat lap disk wheel.. The flat lap wheels have a 1/2-inch arbor hole for Angle Grinder.. They are absolute flat and parallel to meet the most exacting faceting requirements.. For grinding and polishing glass, rock,stone,etc.. Recommended for rough and fine grinding on faceting material plus general lapidary grinding when precision is required..
