The full cheek has straight cheek pieces, with a solid ring to attach to the rein. Because of this shape more pressure is gained on the cheeks of the horse. This makes a horse easier to turn and the bit cannot be pulled through the mouth so easily. In addition, this bit lies calm and stable in the mouth. The full cheek is an ideal bit for young or very hot horses who may not understand steering. The straight pieces on the cheekpiece are slightly bent outwards so that they cannot come into contact with the side of the horse's head. It is important that you put the bit in the mouth with the straight pieces facing outwards so that they can't cause wounds. 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.