The Milwaukee 2531-21HO M12 FUEL Detail Sander Kit includes (1) M12 FUEL Orbital Detail Sander (2531-20), (1) M12 2.5AH Battery (48-11-2425), (1) M12 Charger (48-59-2401), and (1) Carrying case. This kit is designed for the professional carpenter, remodeler, or general contractor; the M12 FUEL Orbital Detail Sander is optimized for precision and designed to complement larger sanders on the jobsite. The M12 FUEL Orbital Detail Sander delivers faster detail sanding, stain grade finish, and more access in corners and contours.