The loose ring gag stimulates the horse to bring its head up. It is often used with horses that run behind the bit and don't follow the hand as much as necessary. The bit can be used with one or two reins or with pelham straps. In most cases, the bit is used with two reins, one is normally attached to the bit and the other rein to the end of the gag straps. This bit is not suitable for the 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 recognisable 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.