Rex-cut Products, Inc.'s Sigma-Screen Multipurpose Discs are depressed center Type 27 abrasive wheels that feature a blend of zirconia-ceramic abrasive grains bonded to a flexible mesh, and come in coarse, medium, fine and very-fine grades. Ideal for the grinding, blending and light sanding of fiberglass and composites, the mesh abrasive wheels are chatter-free and won't clog. The 4.5" diameter wheels can be stacked on grinders for longer life. Also effective for stainless steel, metals, aluminum and wood.
