The hand is held as with a single rein, with the thumb pointing to the horse's ears; in turning, however, there is much less power of bear on either side of the bit by raising the thumb or lowering the little finger, because the distance between the snaffle-reins is only half what it was, and therefore the mode of turning by pressure upon the neck is doubly desirable; and hence its general adoption in those cases where doulbe-reined bridles are used, as in the field and on the road.