This set includes all three grits along with one mandrel to quickly finish finger holes of rings to a bright high shine. Silicon carbide grit in a silicone bond for the most efficient cutting of nonferrous metals. Features a very flexible silicone rubber bond that allows the 180 and 220 grit cylinders to cut aggressively yet leave a smooth enough finish to go right to final polishing with the Pink (1000 grit) cylinder.  Cylinders measure 1″L x 1/2″W and are also sold by grit in packages of 10.  The mandrel is also sold separately (see our 1450146) . Made in Italy.