Review on OTC Reversible Cock Up Adjustable Support by Richard Payne

I received the tires quickly and they have helped me type all day at my job. However, I'm giving them 4 stars because I can't rate them a 4.5 because it's very annoying and sometimes quite painful to wake up with inner metal braces retracting and poking into my forearm at night. There is a small flap of material inside the tires which I used to prop up the supports every night before bed, but not enough to keep them steady when moving. Otherwise, this is a great addition and highly recommended.