Snaffle bits generally employ a lifting action, up wards against the corners of the mouth or lips. The primary emphasis is to produce flexation at the poll. The purpose of the snaffle was to raise the head, neck and shoulders prior to providing a suitable base for the curb to do it's job. The first snaffles were only a mouth piece that rings were attached to. However, today the Eggbutt has eliminated much of the pinching of the ring snaffle. With the Eggbutt bit there is no ring to pass through the mouthpiece.