3M Hookit Gold Film D/F Disc 255L, Aluminum Oxide, Dry Only, 5" Diameter, P180 Grit, Gold (Pack of 100)Aluminum oxide abrasive offers a fast cut, long life, and professional performance on many surfaces Tear resistant film backing provides a close tolerance, consistent finish 3M Hookit discs are easy to change and reuse, maximizing utility for the life of the disc Open coat construction provides a more aggressive cut Load resistant coating prevents dust and debris from clogging the disc For industrial occupational use only. Not for consumer sale or use