The 24V Cordless Corner Finishing Sander is a single speed sander that features an orbital stroke rate of 22,000 OPM and an orbit diameter of 0.03ins. This sander allows you to quickly and aggressively remove unwanted scratch marks or swirls when sanding, resulting in a great surface finish. Greenworks' 24V POWERALL™ battery platform powers a family of over 200+ tools for both indoor and outdoor use.