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 open coat, non-loading cloth belt constructed on a X weight, durable cloth backing. Resin bonded for heat resistance. Grade: P60. Primary market: woodworking.