The 3M 31372 CUBITRON II Clean Sanding Auto Repair Hookit DISC is a 6" dry abrasive disc designed for automotive use. With a 120 grit purple color, this disc is perfect for sanding and smoothing surfaces with ease. The box contains 50 pieces, providing a generous supply for various repair and maintenance projects. The 3M brand ensures quality and reliability in this shop equipment and supply item.