3M 5-Pack 5" 60 Grit Sanding Discs are all purpose and have a universal hole. They are for use with random orbital sanders and all coatings and surfaces. The sanding discs are hookit backed. The Hookit Sanding Disc combines excellent dust removal and fast cutting, long lasting abrasive for higher productivity and lower cycle times. Cuts fast, lasts long, Quick and easy attachment and removal, Ideal for coating removal, leveling and finishing, For use on wood, plastic and metal, Universal hole pattern fits both 5- and 8-hole sanders, Dust extraction.