Review on Enhanced Durability: Bayite Polyurethane Casters - High Capacity without Compromise by Andrew Frison

Only 4 stars because I haven't had a chance to use them yet. Like normal wheels. Rotate freely, lock well. Two have locks, two don't. Screws were not included. Should roll easily over smooth concrete. When they are installed I will update my review. If anything changes. Edit: Managed to use them. I like her. I put them on my stand which has a container that mixes salt water for my aquarium. I'm guessing it's about 200-300 pounds of salt water and they hold up well provided I don't roll them around when full of water.