Wall plate template
This is a template for low voltage wall plate. It has cut out for a level bubble level to be inserted into the print. I do a lot of low voltage work and was tired of getting out my level and mark 4 corners and then connecting the lines. Just hold this up to the wall use the bubble level trace the inside path and your good. The frame is also the same height and width of a wall cover so you can get proper placement on the wall.
the bubble level i used was the SIZIKJXGHWYI 6Pcs Small Bubble Level 10x10x29mm off of amazon,