Our pad's backing is thickened and much harder than others. So, it's very difficult to be broken.High-density and uniform hook provide strong adhesiveness and a . Built-in mounting thread for quick and easy installation. and attaches easily. Features - Color: Black. - Size: 12.20X12.20X1.20cm/4.79X4.79X0.47 inch. - Material: Aluminum. - 8-hole design on each pad prevents dust from clogging sander machine allowing easy cleaning to prolong tool life. - Suitable for uneven surface polishing such as wooden bowls, protection against damage to backing pad, convenient replacement. - Adds support to disc pad for improved abrasive cut and closer edges sanding. - The discs are exactly and tightly fit and adhered with sanders and do not need to worry about falling off. - Widely used in the grinding and polishing of metal and non-metal, wood, rubber, , plastic, stone, glass and other materials. Package list: 1 x Sanding Pad