I created this bracket to be able to mount a parking lot sign on a metal building at an angle because our parking spaces are striped at an angle. This bracket turns the sign to approximately 60° to match the angle of the parking lot spaces so it's easier to see and read when pulling into the space. 

The bracket is very simple and includes a recessed hole for mounting the sign to a metal building or other surface, but does not include a hole in the angled face. I did so you can pre-drill the hole to match the screws you intend to use to hold the sign. Worked very well to mount a sign on our building.