Non-staining Fre-Cut discs. Strong "C" weight backing provides excellent support for a tough and durable aluminum oxide mineral. Pressure sensitive adhesive ensures excellent adhesion to Stikit pads. Use on aluminum, carbon steel, fiberglass, gelcoat, composites, softwood, hardwood and solid surface. Also AOEM finish prep/repair, blending, finishing, orbital sanding, prepping metal prior to paint, and general random orbital sanding applications.