Bulk packaged 5pc 1/4 x 1 1/4 inch fine grit cartridge sanding rolls. Most are of what we would call a fine grit, but they could vary. Cartridge sanding rolls are rolled up sandpaper with a hole in the middle. As the sandpaper gets used, there is more below. Use with 3/32 inch cartridge sanding roll mandrel, not included. For use with Dremel Rotary Tools.