A sanding disc is a tool used for grinding and polishing, typically in handheld or stationary sanding machines. It consists of a circular backing pad and a layer of abrasive material, which can be sandpaper, diamond, ceramics, aluminum oxide, among others.

Sanding discs come in different sizes and grits, depending on the application. Common sizes include 4 inches, 4.5 inches, 5 inches, and 6 inches. Grits vary from coarse 40 grit to ultra-fine 2000 grit.

Sanding discs have a wide range of uses and can be applied to various materials such as metal, wood, glass, ceramics, and many others. Different materials require different abrasive materials and grits, so choosing the right sanding disc is essential for efficient sanding and polishing.

When using sanding discs, safety is critical. High-speed rotation can produce sparks and fragments, so it is essential to wear personal protective equipment such as safety goggles and gloves, and to ensure that the disc is securely attached and correctly used.