7" Backing Plate One Sided Velcro5 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