curb bit 
Bit composed of a mouth and two side bars; it lowers the horse’s nose.
Metal bar that is placed in the horse’s mouth; it is controlled by the reins to steer the animal.
Round part that is attached to the end of the lower cheek; the curb rein is attached to it.
Metal chain that hangs from the cheek rings and passes under the horse’s jaw to secure the bit.
Lower part of the bar that holds the mouth; it is usually longer than the upper cheek.
lip strap ring
Round part for attaching a false curb chain (strap preventing the horse from seizing the arms of the bit’s mouth with its mouth).
Part that connects the curb chain to the cheek ring.
Round part forming the end of the upper cheek; the curb chain and the cheek strap are attached to it.
Upper part of the bar that holds the mouth.
Curvature of the mouth that is designed to reduce the pressure exerted by the bit on the horse’s tongue.