3" 75mm Abrasive Non Woven Scotch Brite Polishing Abrasive Ball 320 grit 320 Grit Deburr, Refinish or Polish any surface 3" (75mm) Diameter Ball mount: 1/4" (6mm) diameter shaft * Working cylinder range of 2-5/8 - 3" * Scotch type material 320 grit * Scuff tool can be used for 2 Cycle Engines with Chrome or Nikasil Coated Bore * Scuff tool is ideal for polishing odd shapes, inside tubes, gasket removal * Works at a variety of speeds, up to 12000 RPM max * Works in any drill chuck * Saves time and effort on tough jobs * Gives a more consistent finish * Brand Name Aluminum oxide abrasive * Zinc-plated 1/4" (6mm) steel shank * Use for heavy scrubbing, removal of rust or scale