I used these to move equipment in the 8000-10,000 lbs range. The job was accomplished, so hard to complain, but there are three things that could be better or would be a better choice. First, these have urethane wheels and that made moving the equipment harder. This was a bad choice at my end to save some money, they do offer solid steel wheels and would be my recommendation. I suspect this added a couple hours to my move. Probably not a problem for equipment weighing less than 5000lbs or so, but really there is no goo reason not to just get the steel wheels in hind sight. Next, the ball bearings fall out from between the bottom and the rotating platform. Tighten the bolt on top right when you get it and use locktite. Finally, the nuts on the bolts running through the wheels are constantly comming loose during use. Either stake the nut to the threads or monitor these closely.