Bosch Professional GTR 55-225 Drywall Sander (550 Watt, Sanding Disc Diameter 215 mm, Includes 1 x Sanding Sheet M480, 1 x Soft Sanding Disc Set, 3 x Cable Clips, in Craftsman's Case - Amazon.com
Eng. Subs) BOSCH GSB 550 - the starter drill you need! - YouTube