Description: Polishing Backing Pad: M10 is commonly used in 100 type angle grinders, M14 is commonly used in 150 type angle grinders, and M16 is commonly used in disc sanders and automotive polishers (optional).Premium Material: The rubber backing pad is made of quality rubber, which is bendable, elastic, wear resistant, and cost effective.All Copper Thread Teeth: The Rubber backer pad uses an all copper thread interface to make it more stable and not easily fall off.High Performance: Polishing rubber pad, fast and convenient to use, convenient for grinding various dead corners, concave and convex surfaces, and curved surfaces, improving work efficiency.Wide Application: The grinding disc backing holder is suitable for bonding dry grinding discs, water grinding discs, velvet backed , etc. Specification: Material: Rubber Size Chart: Diameter 80mm, 10mm Package Includes: 1 Polishing Backing Pad Note: Please allow slightly errors due to manual measurement and different monitors.