The Myler triple barrel 3 ring combination has a curved, jointed mouthpiece with three barrels in centre & features independent side movement. The triple barrel puts pressure on tongue & corners of bars, & collapses slightly on bars & restricts tongue to a degree when under tension. The mouthpiece becomes solid when asking for a stop, & suits strong, sensitive horses that like a malleable bit. Myler combination bits are often misunderstood & 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 & 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 & natural lightness. The 31 31 has a 3 ring cheek which allows for a greater range of adjustment, & can be used with one or two reins.