What you are looking for is a tool system called Power Mallet. The web site is http://powermallet.com/ . I hope this helps tyou, however ths setup costs Not quite $1,000.00 US. So it is not cheap, but if you look at the componets you might be able make someting simaler for less. He is using a motor, flexshaft, and speed control form Foredom Electric Co. web site http://www.foredom.net/ . The kit come with Foredom LX Flex Shaft Motor (5,000 RPM 1/10th HP), Foot Pedal, Desk Top Control unit. And what looks like a Pneumatic Reciprocating tool head. But Foredom also sells that type of tools. try looking at the H.15 Handpiece has hammering rather than rotary action for use at low speed (0-5,000 rpm) 6-1/4" long, 1/4" dia. at tip, wt. 3.65 oz., ship wt. 4.85 oz.
