Wow! As soon as I can find my keys, I'm heading to Home Depot!
I have several climbing roses waiting to be planted. I saw a beautiful display at Longwood in Pennsylvania with trellises that looked like giant M's. I have been trying to figure out what material to use to make such a thing, and you solved the problem! It would be fun to grow climbing beans on the same trellis.
Thank you so much for posting your find!