3M 5″ 255L HOOKIT GOLD SANDPAPER DISCS – An aluminum oxide disc constructed on a film backing. Resin bonded for heat resistance. Constructed of durable aluminum oxide; works well for most wood species. The open coat feature provides a more aggressive cut than a comparable closed coat abrasive of the same grade and a special loading resistant coating makes this disc a good choice when loading is a problem. The flexible film backing provides a consistent finish and greater tear-resistance than a comparable paper product. Discs are 5″ in diameter. Product is sold by the box of 100 discs.