http://www.tendotools.com/en/routing-for-fitting-hinges-3991.html
Special router for installation of all kind of hinges on frames and door leaves. Easy fitting of 3 or 4 hinges per door (right or left open), without measurements and marking. Double depth stopper allows to mortise both depths of concealed hinges in one operation, without changing the plate. The router is also prepared for fitting any kind of traditional hinges.
