Some history on the drills he's using (and others) http://www.lowtechmagazine.com/2010/12/hand-powered-drilling-tools-and-machines.html http://www.lowtechmagazi

Some history on the drills he's using (and others) http://www.lowtechmagazine.com/2010/12/hand-powered-drilling-tools-and-machines.html http://www.lowtechmagazine.com/2010/12/hand-powered-drilling...