The fulmer snaffles are supposed to give a bit more guidance to young or
unresponsive horses by applying pressure to the side of the face, and can also
prevent the bit from being pulled through the mouth. The fulmer snaffles also
help straightness, and when a direct rein is used, pressure is applied to the
opposite side of the face, encouraging the horse to move his head. They can be
dangerous however, and a horse should never be left tacked up and unattended
wearing a fulmer snaffle, as if it is caught on something, it has been known for
the cheek piece to rip the horse's face open. In racing D-ring or large ring
snaffles are used to prevent the bit being pulled through the mouth.
