3M 5″ 740I IMPERIAL HOOKIT SANDPAPER DISCS – Cubitron™ Hookit™ Abrasive Grain product constructed on an E weight heavy paper backing. Resin bonded for heat resistance. A fast cutting, longer lasting abrasive. Primary markets are metalworking and woodworking. Also excellent for stripping paint or sanding marine fairing compounds. Product is sold by the box of 25 discs.