From the Manufacturer
3M's resin-over-resin industrial sanding belts are made with an open coat to resist loading. Sharp aluminum oxide grains are anchored by heat-resistant bond, assuring maximum belt life while giving aggressive cutting action with a uniform finish. The strong "X"-weight cotton backing is treated to prevent stretching and slipping and gives the belt positive tracking.
Product Description
An aluminum oxide, load-resistant, open coat belt constructed on a durable X-weight cloth backing. Resin bonded for heat resistance. Good general purpose belt for woodworking, particularly on soft woods. Film media splice. Grade: P60.