Review on 4-Pack 1.5 Inch Swivel Stem Casters - 330 Lbs Capacity, Non-Marking Polyurethane Wheels & 3/8"- 16 X 1" Threaded Stems With Nuts For Furniture Carts Trolleys. by Dave Butler

I was skeptical about these wheels because they're relatively small but the brake style as well as brake quantity are far superior on these then the 3 and 4' alternatives I also tried that only have brakes on half the wheels. The shelves I used them on still move around when braked. These are rock solid when fully engaged and there doesn't seem to be a difference in total weight bearing load either. Returning the others for more of these.