Developed to dramatically reduce time spent on the removal of Pinstripes, Adhesive and Double Faced Tape; Fast and easy; Molded rubber with 5/16″" – 24 thread arbor for use with the 533ET or 1208A; Pad size: 4″" ; For use with Astro model # 533ET or 1208A; USE WITH MAXIMUM RATED 4000RPM TOOL; NOT FOR USE WITH STANDARD NON-GEARED DIE GRINDERS; Accessory available 400E-AR Arbor for Smart Eraser® Pad"