With traditional buffers you would have to screw in each pad with a wrench or deal with bonnets. This backing plate is designed to screw right into the Porter Cable 7424, so you can easily swap out your favorite pads. After the backing plate is attached to the Porter Cable it stays firmly attached and the hook and loop pads lock in place. The backing plate is semi-flexible which allows you to work on curves and tough to reach areas. Most importantly the 6-inch backing plate is perfect for the 6.5-inch pads. It allows you to get firm pressure over the entire pad, unlike 5-inch and 3-inch backing plates, where the edges of the pad become flimsy. With firm and constant pressure you can breakdown each product and work them in to the surface properly. Now your polishes will give you a deeper shine and waxes will adhere to the paint longer. The Porter Cable 7424 6” backing plate save you time and effort as you achieve better detailing results.