i-Liftequip desk and cabinet corner mover dolly. Sold in one set (4 pieces), the corner mover is made of press steel frame. 0.6-inches load height, for a combined load capacity of 1320 pounds per set. Easy to use: slide one piece under each corner of the load to move. Easy to position-lift one side of load by a transport jack and slide in corners, then repeat for other side. 3 pieces ball bearing castors in each corner mover. 330 pounds maximum load each. Castor measures 1.97-inches diameter by 0.79-inches width. 0.60-inches load height.