Benchmark Abrasives 7 Inch Sanding Discs Zirconia Resin Fiber Grinding, 50 Grit Benchmark Abrasives 7" diameter and 7/8" arbor zirconia resin fiber discs are commonly used for surface preparation, blending, chamfering, paint or rust removal, etc. These heavy stock removal discs are ideal for tough materials like metal stainless steel. The strong and tough design of the discs provides consistent performance. The surface finishing discs have heavy-duty vulcanized fiber backing and heat-treated phenolic resins for increased strength, durability, and tear resistance. The superior design of discs minimizes loading, glazing, and grain stripping. High-performance resin fiber finishing discs are compatible with an angle grinder and should only be used with a backing pad and nut. Made of zirconia grains that provides sharp and clean cuts. All of our abrasive products are made with quality materials and exceed both ANSI and EU European Standards. We trust in delivering high-quality products to the end-user. Customer satisfaction is the lifeline of our brand.