3M™ Imperial™ Hookit™ Disc 745I features a 3M™ Cubitron™ Hookit™ Abrasive Grain constructed on an E weight heavy paper backing that is resin bonded for heat resistance. The coarse grade aluminum oxide mineral abrasive is ideal for aggressive jobs including stripping paint to bare metal, shaping and sanding plastic filler and more. 3M™ Stikit™ Attachment makes disc change-outs fast and easy. Use with suggested 3M™ Backup Pad PN05779.