SAWS 7 Metabo Concrete Polishing Tool. The 7″ Metabo Concrete Polishing Package comes equipped with Metabo PE 15-30 variable speed grinder (13 AMP, 800 to 3,000 RPM), 7″ convertible dust shroud, 5″ loop handle, and 7″ flexible backing pad. They come with a Velcro backing pad and are intended for use with resin polishing pads.