Mirka's Interface pads are used for sanding rounded surfaces and contours in combination with grip sanding abrasives. The interface pad is placed between the backing pad and the sanding disc, and produces a softer result than sanding without the pad. The pad protector disc protects the backing pad from wear and tear when sanding aggressively and continuously with Mirka's net products. This cost-effective pad saver, placed between the backing pad and the sanding disc, should be changed regularly to prolong the life of the backing pad.