A bradoon is used in combination with a weymouth, so there are two different bits in the horse's mouth at the same time. The rings of a bradoon are smaller so that there is enough space for the weymouth. The double bridle combination is mainly used in higher dressage classes and is not suitable for an inexperienced rider. A jointed bit has one hinge point, which means less pressure on the tongue than with a eliptical mouthpiece. A jointed mouthpiece exerts pressure mainly on the bars, the side of the tongue and can also have an effect on the palate. A jointed mouthpiece is seen as a standard mouthpiece. The Sweet Iron bits are made of steel and have a recognizable blue color. Sweet Iron will rust when it comes into contact with (air) humidity, the surface rust tastes sweet and naturally stimulates the saliva production. This will cause the horse to salivate more, which in turn will encourage a better acceptance of the bit.