I tried it on my hand and it allowed so much force to be applied that it would have crunched a carbon fibre frame. Great job by Swagman ! It was a ruff start with this machine but I wanted it more for the standing part. Wonderful product. Travel case is awesome. 5 feet fine however i feel like a wide option with a slightly larger circumference on the strap would be a good idea for people with wide feet like myself. I just wish crocs would make more winter shoes. Am sure this case would protect the head phones should they be able to stay in the case but the case is no good for staying shut if you add them to your key chain they will probably fall out I couldnt be happier with this and its perfect for the use I purchased it for. however, .