PORTER-CABLE 43700PC Straight Router Bit
The Porter Cable 43700PC  13/16" Hinge Mortising Cutter is designed for mortising of doors to accept locks, lock face plates, hinges, and for general stock removal.   All cutters fit 1/4" - 28 threaded shank.  Specifications:  Cut Capacity - Width 13/16 ", Flute Length 9/16".