A wall mounting bracket installed includes a body and a slidable wing that slides along the body and mates with the discrete attachment positions along the body. In preferred embodiments the body can have a substantially rectangular perimeter and a substantially rectangular opening or a substantially ovoid perimeter and a substantially ovoid opening. It is also contemplated that the body can a perimeter that is of a different shape than the opening or multiple of openings within one perimeter. The opening area preferably have an area of at least 20 in2 and the body has a perimeter-opening distance of less than 1 inch and at least one entry position with markings. Furthermore, the mating portion-opening distance of bracket is less than 0.9 in. Preferred embodiment includes a commercial product comprising the bracket with a body, the slidable wing in which the wing can be pre-attached to the body or not.