Ryobi P401 One+ 18-Volt Corner Cat Finishing Sander w/ Included Sandpaper (Battery Not Included / Sander Only) 11,000 ORBITS PER MINUTE helps result in virtually non-swirl finishes PERFECTLY SHAPED FOR CORNERS with intuitive design COMFORTABLE OVERMOLD provides a solid grip so that you can sand precisely and comfortably ON BOARD DUST PORT allows you to attach your favorite shop vacuum (not included) PART OF THE ONE+ FAMILY: This will work with Ryobis 18v One+ battery. Even the yellow Ryobi 18 Volt batteries will work