The Weymouth, or curb bit, in a double bridle consists of a mouthpiece with shanks and a curb chain.
The Weymouth works on several parts of a horse's head and mouth. The bit mouthpiece acts on the bars, tongue and roof of the mouth. The shanks add leverage and place pressure on the poll via the crownpiece of the bridle, to the chin groove via the curb chain, and, especially with a "loose jaw" shank, may act on the sides of the mouth and jaw.
Supplied with English Curb Chain and hooks.
The Happy Tongue Straight is a solid mouth bit which is ported to relieve tongue pressure but is not curved. This makes it slightly harsher than the curved Happy Tongue. The Happy Tongue Straight complies with FEI requirements.