PORTER-CABLE 43703PC Straight Router Bit
The Porter Cable 43703PC  3/4" 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 shanks.  Specifications:  Cut Capacity - Width 3/4 ",  Flute Length 9/16".