7 inch Cheeks, 5 inch Mouth, 1 inch Port. Ported Large Chain Mouth. This bit is designed for the mature competition horse. 1 inch gag action with the new "no pinch" ball hinge. Primarily used to lift head and shoulders for control in speed events. This bit gives you the option to pull on your horse a little more while asking him to turn a bigger pattern. It also adds to the willingness of the horse to use their hind end. Medium to Maximum Control.