Flexi bits are warmer to the touch than traditional stainless steel bits, making it ideal for younger horses or horses with a sensitive mouth. The main action is on the horses poll, the roof of the mouth and on the bars of the mouth. The amount of poll pressure can be increased by attaching the rein to the bottom rings, therefore making the bit stronger and more severe. Can be used with one rein, two reins or with roundings. If a small amount of chin pressure is required, curb hooks can be attached to the top ring to use a curb chain, or a leather strap can be looped through the top rings and under the chin. Ref: UTBZ1578