A dielectric cover is detachably coupled, in enveloping fashion, about the motor casing portion of an electric hand drill of pistol form with a front portion extending beyond the drill shaft projecting from the front end of the drill casing. The cover acts as a torque tube to support a right angle drive...http://www.google.com.au/patents/US4801780?utm_source=gb-gplus-sharePatent US4801780 - MIG welder attachment for an electric hand drill
