The Korsteel Hard Rubber Mullen Mouth Pelhams thicker mouthpiece is softer on the corners and the bars of the mouth than a thinner bit, as the pressure created by the reins is spread over a larger surface area. The hard rubber is a good alternative to the softer rubber as it is more durable against chewing and general wear and tear. This Mullen Mouth Pelhams main action is on the curb, the bars of the mouth and the horses tongue. The mouthpiece is milder than a normal jointed bit. The tightness of the curb chain has a direct affect on how much pressure is applied to the curb. This bit is designed to be used with two reins: one rein on the snaffle or bradoon ring, and another rein on the curb ring. The pelham is very popular in the showring for childrens ponies, as it teaches the children to ride with two reins without having to use a double bridle. It is also widely used in eventing and showjumping as an alternative to a gag bit. This bit should be checked for general wear and tear before every use. Ref: UTWB617