Multiple Sizes & Quantity High Quality Material - Made from aluminum oxide abrasive, durable and anti-static, ideal for corner cleaning and polishing, such as polished metal, wood, jade, etc. Soft Foam Buffer Pad - The sanding disc kit includes 1pc soft foam buffer pad, great for reducing tail-off in use Convenient to Use - 50mm diameter, suitable for most rotary tools, such as die grinders, air grinders, electric drills, etc. Warm Note - These sanding disc pads fit 50mm backing pad, not suitable for sanding backing pad, please clean the dust and replace the sanding backing pad before using them