DEWALT 20V MAX* XR Cordless Polisher, Rotary, Variable Speed, 7-Inch, 180 mm, Tool Only (DCM849B) - Amazon.com
DEWALT XR 20V Lithium-Ion Cordless Rotary Drywall Cut-Out Tool (Tool Only) DCE555B - The Home Depot
Shop DEWALT 1-Speed Cordless 20-Volt Max Cutting Rotary Tool & 4-Tool 20-Volt Max Brushless Power Tool Combo Kit with Soft Case (2-Batteries and charger Included) at Lowes.com