1/2in Wide Corner Offset Narrow Extension Swivel Baseplate for Adjustable Swivel Mounts

This baseplate is used for the adjustable mount in CORNER areas and has a 1/2 wide extension piece that can vary in extension distance measured from the underside of the mount   

This  can be installed in corner that only has 1/2n wide trim where you can fit a swivel base and let it overhang on side.   The screw holes are offset 1/4in from the edge.  So if you can install the screw inside a  1/2in wide trim off the wall and the area is flat, then this adapter plate will fit.  It can also be customized with a small angle.