Matching aluminium profiles which interlock to hang larger pictures and mirrors.
One strip of the pair is screwed to the wall, pointing up, and the other strip to the back of the frame, wood or polymer, pointing down. Frame hooks onto the strip on the wall. Just one strip on the wall can engage with an aluminium frame. The load is spread across several screws in the wall and the frame. The method is often used by professional installers.
A pair of the extruded profile is 48mm tall and the frame sits 6mm off the wall. A pair of the stamped AMS profile is 42mm tall and the frame sits 4.5mm off the wall.