Our fiber discs are constructed with a vulcanized fiber backing, and are used for a wide variety of applications. Use for heavy stock removal, grinding down and blending welds, rust removal, finishing, de-burring metal and high production work; automotive, plastics, ferrous metals, paint, body fillers and fiberglass. Heavy duty sanding and grinding of wood, metal, fiberglassResin bonded to resist heat and humidity for longer lifeDurable design allows to be used to blend welds as well as strip paintFor use with backer pads on angle grinders