Description: Used on polishers and grinders with Soft Polishing pad threaded spindles. Fit diamond polishing pads of same or larger sizes. Allows for a fast switching between pads with hook and loop backing. Ultra-thin rubber with high quality copper head, not easy to fall off, easy to open glue, suitable for surface grinding. Diameter: 3inch/76mm Material: Rubber Package Includes: 1 Piece Rubber Back Pads