MEGUIAR’S DUAL ACTION POLISHER BACKING PLATES – Dual Action Polisher Backing Plates allow quick and easy pad changes with Velcro® backing system. Fits all Dual Action polishers with 5/16″ diameter shaft. Ideal for use with Meguiar’s® Dual Action Polisher (G100/G100A). For use with 6.5″ pads. Sold by the each.