The 7" Velcro Back Plate Yellow is literally the best of both worlds. Made with a premium quality HD plastic in the middle. Made of a injected molding to help re enforce the center of the backing plate to help with the wear and tery of the usage of a rotary buffer. The VBP7 is forged with 1.2" Flex Edge. Our Flex Edge is composed of a polyurethane rubber. The polyurethane rubber helps to provides a cushion while buffing over contour parts of the car.