I've been installing electrical boxes for longer than I can remember and every time I rely on the supplied cutout template which MUST come with the box. I ordered two of these and luckily one of them (and only one) came with a pattern and instructions. These ceiling boxes aren't the most difficult to install, but you will need a template and instructions written on it. Without this, the beginner is easy prey. Like I said, luckily for me, one of the two I bought came with a stencil (each was individually sealed in its respective bag). I'm sorry for those who only receive one and end up not receiving the above template. There doesn't seem to be any quality control at the moment - and the bar is getting lower and lower.
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