
I used to work R&D for a lock company. I would sometimes have to go to a location usually a hospital to service the automated exit bars, sometimes hundreds for a few days. I would alwas get a couple of these. Massive help to not be doing down-ups all day long. And you can use a pair as a cart for hauling materials. Before I figured this out my legs would be aching for days after. I would also donate them to the local installers that were helping.
