This cheekpiece has a D-shape. The D-rings ensure that the mouthpiece lies calm and stable in the horse's mouth. The pressure of the cheekpieces against the cheek makes it easier to turn by automatically pushing the horse’s head in the right direction. This makes the bit suitable for young horses. The shape of the cheekpiece makes it less easy to pull the bit through the mouth. 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.