Our tote express offers maximum storage capabilities with the ease of wheel transport. The top unit is sized to hold albums and storage boxes, including super satchel boxes (see below). The reinforced front base adds even more support for safe transport of supplies. The bottom unit is securely mounted to the double, roller skate wheelbase and the locking, 2-stage handle. The top unit securely attaches to the bottom unit via sturdy buckles and a back strap that fits over the handle base. A shoulder strap on the top unit also allows this piece to be transported separate from the base. The tote express can hold a variety of the super satchel boxes including: (2) 6955ab, 6956ab, 6957ab or 6958ab standard depth or (4) 9100ab/9101ab slim or a combination of (1) 6955ab, 6956ab, 6957ab or 6958ab standard depth and (2) 9100ab/9101ab or (1) 6990ab super satchel double deep.