The French link Pelham has the kinder action of the French link mouthpiece, laying across the horses tongue, relieving the nutcracker action and preventing palate pressure. The broken mouthpiece of the French link can effect the way the curb comes into play and lessen the direct action of the curb, but putting more pressure on the bars of the mouth and possibly the palate.
4″ is the length of the shank
4″, 4 1/4″, 4 1/2″, 4 3/4″, 5″, 5 1/4″ & 5 1/2″