The Gray Self-Centered Hex-Logic Medium Life Polishing Pad is a less dense foam formula for the application of waxes, micro-fine polishes and sealants. This pad has very light cutting power so it is perfect for pre-wax cleaners as well as many finishing polishes. This pad features PUR+ (Poly-Urethane-Reactive Bonding). This pad has the most durable and resistant backing plate, it is soft and gentle to paint. The PUR+ backing plates can be washed hundreds of times guaranteeing a perfect grip with every use that is PUR+ technology. This pad also features Hexagon technology, also known as Hex-Logic. Hex-Logic pads are designed to hold product and distribute it evenly over the surface of the pad delivering a superior even finish that is hard to achieve with any other pad. The unique construction of the pads makes them extremely easy to maneuver while distributing the product evenly on the surface. The Hex-Logic pads keep the product in the groves while you start and as the pad is spun and rubbed against the surface, the polish will travel through the hex-groves into the pad, evenly delivering a superior accurate finish. The surface is constantly lubricated which reduces friction and marring. The unique hex laser cut surface of the pad enables Hex-Logic pads to conform to the shape of the surface delivering maximum surface contact. The Hexagon construction forms perfectly to a vehicle's many curves while the unique pad construction reduces unnecessary heat. The Self-Centered Pads are uniquely sized to 7.5 inches making them perfect for big or small jobs. These pads have a "V" like construction so the face of the pad is wider than the backing, offering a one inch foam protector that assures no matter how hard you push, you will never hit the backing of the plate against the surface.