Osborn BrushThis rotory brush will quickly clean and sand logs prior to sealing staining. Features: 80 grit grit impregnated nylon fiber cup brush; Excellent for secondary prep or hand sanding; Use on variable speed grinder Made with heat stabilized nylon filaments impregnated with Silicon Carbide for mess free sanding and buffing Long lasting _ one or two brushes will remove felting from an average 2000 sq. ft. home Use with a variable speed grinder for a