They are very sturdy and swivel easily and smoothly. I'm really impressed with how well they glide and maneuver. They're super low profile and glide wonderfully on concrete.

To lock isn't difficult, can't do it with your bare feet though. It is a little hard to unlock, but i just have my fiance do it. Dual locking system is the only way to go.

I have all my tools in my shop mounted on wheels and have never had a problem. Great for reasonably hard and smooth surfaces, but does not work well on bumpy surface due to its small wheels. If you need to roll island, these are the best wheels on ama...  Read More

This obviously makes the cart all but useless.

If your floor is not perfectly flat the casters become unloaded when one rolls over a dip in the floor. The springs keep the lift arms from disengaging.

I feel like amazon is starting to get sloppy with this stuff. Not happy at all.