The Pelham bit is often used for horses that prove to strong in a snaffle,
The Rugby Pelham is mainly used for showing as a very popular alternative to a double bridle. This bit may be preferable to a double bridle as some horses do not tolerate having twoBits in their mouth, as their tongue may be too fleshy and their palate to low. The Rugby Pelham gives the appearance of a double bridle, due to the loose snaffle ring looking like a bradoon bit.
The French link has proven one of the most popular mouthpieces; it has 2 joints, which means the pressure of the bit is distributed over both the tongue and bars of the mouth. Because the mouthpiece has two joints, it shouldn't cause any interference with the roof of the mouth. The French link uses tongue pressure to encourage the horse to go on the bit and has bar and lip pressure but not a squeezing action like that of a bit with a single joint.