A multi-function tool system (200) which includes a singular tool housing (1) containing an electric motor (10). A plurality of tool head housings (2, 2', 2", and 2'") contain respective reduction gears (20) having particular speed ratios to allow individual tool members to be driven in a rotative member...http://www.google.fr/patents/US5033552?utm_source=gb-gplus-shareBrevet US5033552 - Multi-function electric tool
