5/8" x 11" female thread backing plate for wool and foam buffing pads with velcro® hook type material. Screws onto most electric, high-speed polishers.5/8" x 11" female thread backing plate for 8" wool and foam buffing pads with Velcro® hook & loop system. Made of high quality polyurethane which is very durable and dampens polisher vibration. The polyurethane surface is uniform and balanced so that results will be even. The Velcro® brand fasteners are permanently molded to the polyurethane so pads will lock securely in place. Mounts onto most electric, high-speed polishers.