I used these feet under the vertical posts on my wall tent and wrapped the ground cloth under the feet. to seal down the walls. This kept the tubular metal frame from digging into the ground cloth. I use 1" EMT conduit for a frame, and even though these are a larger diameter, they worked well with the thumbscrew adjustment.
Bought these for our new canvas wall tent so the legs wouldn't dig into the ground. They worked fine and the pick up at store was convenient. One of the few items for this tent that Cabelas wasn't way more expensive then other places.