Professional backing pad for commercial or occasional use 6" / 150mm Hook and loop backing pad Suitable for all DA and other sanders Suitable for use with hook and loop style polishing sponges, bonnets and sanding discs Comes with a 5/16" x 24 male thread Maximum speed of the pad 10,000 RPM Compatible with air and electric sander polishers requiring 5/16 inch UNF male thread fitting Firm structure with semi flexible edge The pad has 8 extraction holes which are suitable for use with or without dust extraction tools High density pad for strength and durability