When you need maximum adjustability on your wall mounted light combined with a smaller form factor, the Sentry-short-WM is your light. The multi-axis - pivoting knuckle allows for 540° about the horizontal and vertical axis. A single tightening bolt (thumb screw) secures movement of the light fixture in both planes. The M1-Wall mount features two seperate input points. This gives you the ability to add another light on the opposite side, which transforms the fixture into a sconce light. You still get the LED performance of the MR16 lamp.