This 6 inch DA backing plate is supplied with standard 5/16”-24 male threads and will fit DA polishers like our CHE-S25 and CHE-X25, etc. The multi-hole backing plate could keep the temperature down when polishing, a must for hot dry summer day. 6” DA backing plate is soft urethane molded with a medium density. It is ideal for contour polishing. Performs perfectly and applicable for foam pads and wool pads. Uses high-quality polyurethane that is durable and decreases vibration. The polyurethane surface of the backing plate is balanced so the car surface can be shinier. Its design of multi-hole makes the plate more effective during the polishing. This flexible backing plate could fits the curves of the vehicle and dampen the vibration.