To be honest I'm a bit disappointed with these portable desks. Within the first 30 minutes of use, the outer part (tread) of a wheel would crack and roll off the hub. The latch lever that holds the deck in the up position is weak and flexes, causing the latch lever to fall through the frame and hit the floor. If you are using these dining tables in a school setting I would suggest spending a little more and looking for dining tables that are a bit more durable. All in all I got what I paid for. These table movers are rated at 600lbs, which is the same weight capacity as all table movers, but with these wheels, that's an inaccurate estimate.