3M 00515 Green Corps Hookit 6" 40E Grit Regalite Disc Hookithook and loop attachment makes disc changes fast and easy Ideal for shaping filler and stripping paint to metal Ceramic aluminum oxide blend offers excellent cut rate and life for increased performance over traditional abrasives when sanding on metal, plastic and fiberglass substrates Built on D and E weight backing, making them extremely durable Open coat construction provides a more aggressive cut and minimizes dust clogging on the abrasive for increased productivity