http://www.ebay.com/itm/Vtg-1930-3-8-Drive-Douglas-Aircraft-K2680-Lever-Ratchet-Wrench-Airplane-RARE-SK-/192037322491?hash=item2cb650fefb:g:sSMAAOSw4shX8Z3w

Prolly a tool some aircraft mechanic welded up to get him around an access problem he was experiencing during the day. Interesting idea - could probably be duplicated by someone who was good at TIG welding.