As with the Pelham, the action of the Kimblewick is dependent upon the position of the riders hands. The rein slides on the Dee shaped bit ring.
If the hands are lowered prior to pressure being applied to the reins, the rein will slide about an inch and the bit will assume roughly a 45° angle in the mouth. Causing the mouthpiece to act in a downward and backward motion on the lower jaw, this is complemented by a downward pressure on the poll, giving the bit a lowering action.
It is supplied with nylon backstrap.
The Elliptical Roller is made of brass or sweet iron, which is designed to heighten the horses awareness of the bit. When the rein is used this mouthpiece wraps across the tongue creating tongue pressure and reducing bar pressure. Please note appearances may be deceiving, this bit joint is stronger than the Control Plate as pressure is more concentrated on the tongue.