Norton Silicon Carbide Screen Bak 16'' Diameter (10/Box)Norton Silicon Carbide Screen Bak 16'' sanding discs feature open mesh backing that extracts dust efficiently and resists clogging, extending disc life. The silicon carbide abrasive delivers aggressive cutting performance on wood, concrete, and hard surfaces. Each box contains 10 discs sized for floor sanders and large scale equipment. Ideal for hardwood refinishing, deck restoration, and professional surface preparation work.