The Rockwell RW9145 is a Set of Soni Crafter Sanding Sheets #40, #80, #120, #180, #220. Features: * Assorted grits for universal sanding applications. * Use on wood, plastic, and hardened fillers. * Perforated for use with dust extraction kit. * Use with the Rockwell SoniCrafter. * Includes 4 each of 40, 80, 120, 180, and 220 grits. What"s In the Box: * Rockwell RW9145 Soni Crafter Sanding Sheets #40, #80, #120, #180, #220