Amana tool 45183 Carbide Tipped Mortising 1-1/4 D x 1/2 CH x 1/4 Inch SHK Router Bit

For cutting shallow mortises for hinges and locksets, use this bit. Its cutting geometry is calculated to produce an exceptionally clean cut with crisp edges. A proper mortising bit, as shown, should have a large gullet between the two flutes.