This Horze Mullen Mouth Weymouth Bit with 14mm mouth and 135mm shanks is typically used in conjunction with a bradoon bit to create a double bridle. Curb bits on their own have little directional control, but are used for their leverage in aiding the horse to bend at the poll.
This Weymouth is made of quality stainless steel and includes a curb chain with an extra link for the addition of a lip strap (sold separately).