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.
The Sweet Iron bits are made of steel and have a recognizable blue color. Sweet Iron develops surface rust through contact with (air) moisture that tastes sweet and stimulates the horse's saliva production naturally. This will cause the horse to foam more, which ensures better acceptance of the bit. This rusting process (oxidation) changes the blue color of the TRUST bits to brown-gray.