This dutch gag has a waterford mouth, which is made of a series of rounded links. If the horse pulls whilst wearing the waterford, the mouthpiece is uncomfortable and usually the horse will not lean on it. The gag bit works by raising the bit up in the horses mouth. In addition to this, a lot of poll pressure can be achieved with the lower ring of the dutch gag. Often this bit is only used with one rein on the lower ring, but ideally if only one rein is to be used the bit should be used with rein connectors to maintain a better contact with the horses mouth.
Most horses work better in one size larger than their normal bit size when ridden in a waterford mouthpiece. Exerts poll pressure and a limited gag action.