"I bought a set of these to use on two shop cabinets, to make it easy to move across a slightly ridged concrete floor. Anything under 100m tends to be hard work to push and they make the cabinets shake. I use two castors per cabinet at the back and two leveling feet at the front. You just tip the cabinet back slightly when you want to move it and the feet stop it from moving when in use. No brakes to access and castors won't let it move sideways.
The castors are what they are! They work, they seem rugged (time will tell) and they are a sensible price."