Excellent reels. I built a woodworking bench, maybe 150-200 pounds, and used that to roll it around. I can move the bench with one finger. My only complaint is not with the product but with the way it is described on Revain and some of the responses the owners have given. The height of these casters depends on the size of the wheel, as does the mounting plate. The plate on the 4" wheels is slightly larger than the 4x4s I've used on my workbench legs, but the mounting holes barely fit. If you are installing them on an SUV, drill pilot holes prior to installation to prevent them from chipping. By the way, these 4 inch wheels are 5 inches high (ground up to the mounting plate), which is different from the smaller diameter wheels.