The Myler triple barrel 3 ring combination has a curved, jointed mouthpiece with three barrels in centre and features independent side movement. The triple barrel puts pressure on tongue and corners of bars, and collapses slightly on bars and restricts tongue to a degree when under tension. The mouthpiece becomes solid when asking for a stop, and suits strong, sensitive horses that like a malleable bit. Myler combination bits are often misunderstood and thought to be severe. The action of a Myler combination is to use up to 5 pressure points on the horses head as opposed to one or two that most conventional bits work on. This means the combination will give the rider superior control, without using excessive force in any one place which results in a much more relaxed and comfortable horse. Myler combinations can be useful to school horses in when they are normally ridden in a double bridle, as it encourages self carriage and natural lightness. The 31 31 has a 3 ring cheek which allows for a greater range of adjustment, and can be used with one or two reins.