Made of 20-24 gauge steel. Drawers each 50lb load capacity. Drawers also have full-extension ball bearing. Locking key system supplies secure storage. Rolling cabinet features four 4" x 2" caster wheels with two that lock and swivel. Cabinet has top mat to protect the surface. Top chest has two recessed side handles and a top lid with gas struts. Rolling cabinet: 8030 Cubic inches 26.5"W x 18"D x 32"H. Middle Chest: 1830 Cubic inches 26"W x 12"D x 11.5"H. Top chest: 3663 Cubic inches 26"W x 12"D x 17.5"H. NOTE - Ships in multiple boxes.