The most heavy duty of coated abrasive discs, full resin bond on vulcanized (cotton fibers treated under intense pressure and heat) fiber backing. Designed for applications ranging from heavy stock removal to surface blending. Used with back up pads on portable angle grinders. Featuring a high performance blend of zirconia alumina abrasives, BlueFire® AVOS® F826P coarse grit fiber locking see thru discs last longer, cut 15% faster and draw less power than standard zirconia discs. An excellent choice for coarse grit, fiber disc work, these discs cut aggressively and with up to 30% less heat for extended disc life. Engineered with the patented AVOS® (Allows View of Surface) hole design, these see thru discs make work at hand easier to see, while the Speed-Lok® arbor mount makes it quick and easy to change discs without tools.