Cabinet hanger, For mounting in drilled hole, keyhole slot

Keyhole slots with dovetail bit? keyhole slot I would like an FS that will cut a keyhole by defining a major diameter, minor diameter, slot length, rotation angle, and end type I think keyhole slot Infinity Cutting Tools - Keyhole and T-Slot Router Bits More Info:

keyhole slot bit keyhole slot is not feasible , assembly can be sim- ply achieved by using a separate retainer With its own integral keyhole slot feature , it can be