Both the floor and gate latch system are mounted on the right gate. Making the left gate, the primary gate. The dual gate capacity system can be utilized moving large items in or out of the house. The gate casters are multipurpose; to keep the gates from sagging, and help support the weight of a child (the castors do not readily roll across the angled deck board, and they move only when manually pushed. The castor stopping mechanism is the gate hinge system).