The product is faulty. Center axle diameter needs to match the bearing inner diameter. Currently there is too much play allowing wheel to wobble.

Easy to install, discrete and they roll. This is a game changer. Only bummer is the casters are leaving marks on the surface.

Idea behind this is great but the execution is a flop. Hit a crack on the floor about a quarter inch wide. There is no way to fix it so it's money down the drain.

Need better descriptions, very lightweight apparently. It is useful only if it is something that weighs ounces and if you have extra double tape or gorilla glue lying around.