Heavy Poster Wall Mounts

Here is my design that I initiated for a heavy poster I had wanted to put up.The poster I have weighs about 20 pounds (very heavy for a poster), and I only used 2 of these mounts. The screw-in holes are rated for a Brass Phillips Flat Head Screws for Wood, Number 10 Size, 1-1/2" Long which you can find at Home Depot or any hardware store. This is my personal product, please do not copy without giving credit. The cap is included optionally, but wouldn't be show anyways if you were mounting something permanently.