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. An eliptical (double-jointed) mouthpiece is a standard mouthpiece.This mouthpiece has two hinges, is shaped more towards the mouth and lies somewhat looser in the mouth. This bit exerts pressure on the tongue, the layers and the corners of the mouth. Be careful with narrow lower jaws, the hinge points can press on the layers which can cause wounds. Compared to a single jointed bit, this bit exerts more pressure on the tongue.
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.