MULTI PURPOSE: Don’t ever stress about moving a desk, bookshelf, vending machine, or big item again. IMPRESSIVE MOBILITY: The 2” swivel casters can be rotated 360° to transport any rectangular item with ease. LOW TO THE GROUND: Only lift your equipment 0.6” off the ground onto the 2.5” deep dollies, without pulling a muscle. Safety first. SET OF FOUR: Don’t wait to rearrange your office space or spare bedroom. Our case of four guarantees you can start as soon as you receive it without waiting for other parts!