Distributes pressure evenly for optimum defect removal and finishing. Precisely tuned outer edges allow you to navigate the curves and contours of any vehicle with more consistency. Quick and easy disc changes with micro hook and loop attachment system. Fits all DA Polishers with 5/16" diameter shaft. Rotation indicator marking allows user to recognize backing plate rotation for ideal results. Additional rivets for reinforcement and strength Precisely tuned outer edges for ideal disc contouring over flat and curved surfaces.