AES Industries 6" Round Nylon Filament 80 Grit Silicon Carbide Abrasive Bristle Surface Prepping Cup Brush with 5/8"-11 Thread - Max RPM 6,500 COARSE CUT 80 grit embedded nylon brush strands evenly wear down during use, freshly exposing new grit for clean and fast scuffing / prepping with every use. THE "GO TO" abrading brush for quickly and properly prepping old and new surfaces before applying sprayable bed liner. SAFE AND EQUIVALENT, non-sparking alternative to steel wire cup brushes which can react and cause sparks when working on surfaces with a metal base or structure underneath. DESIGNED TO WORK effectively without loading or clogging on multiple surfaces including metal, wood, aluminum, and plastic. This brush can also be used to create a decorative swirl finish on stainless steel, aluminum and sheet metal surfaces. SPECIFICATIONS: 6" diameter brush head, 80 grit abrasive nylon strands, 5/8" - 11 Thread, Maximum RPM 6,500.