I love this super heavy duty toolbox, but its murder on wood floors. I wanted some TPU corners to protect floors I set it on that could be riveted or screwed to things. I added a little architectural motif to them that I saw on the famous Geene and Greene "Gamble House"…. because why not? If you're going to do it…. overdo it. I used a modifier to make the area around the hole to print solid so that it can be drilled larger and to add rigidity. It can be printed in PLA or TPU. I picked TPU just for the cushioning effect it has. The lip around the edge helps it stay in place and protects the vertical corners of whatever you're putting it on. The screw hole is recessed to keep the Fastner from scratching the floor.