Thick and strong support ensures a longer service life. Prevents premature burning of the work surface. Disc or sheet firmly secured to its support. For initial and intermediate stage sanding on hard and soft woods, metal surfaces, plastic and synthetic materials. Compatible with most supports on the market. Quick and easy disc changes. All discs have hook and loop type fastening and can be attached and re-attached as many times as necessary. All abrasives are synthetic resin bonded. All discs can be used with Norgrip® Backing Pads.