The CRL Polishing Head Assembly consists of a 1-1/2" (38 mm) thick x 3" (76.2 mm) diameter wool felt wheel, aluminum adapter plate, and a 1/4" (6 mm) diameter shank all combine to make the CRL Polishing Head Assembly. Use it with our Cat. No. PV7001C Polisher, or chuck it into your electric drill. It will remove light scratches and water deposits from glass using any electric drill or power tool with a standard chuck or 5/8-11 thread mount.