What type of bit is characterized by its leverage design and applies pressure under the chin and at the poll?

The Pelham bit is designed to provide leverage through its unique construction, featuring both a straight mouthpiece and two reins that allow for different levels of control. The leverage creates pressure not only under the horse's chin but also at the poll, which helps the rider communicate more effectively with the horse, especially in managing speed and direction. This design makes the Pelham a versatile option for riders who need a higher level of control without using extreme measures.

The leverage aspect is particularly beneficial for horses that may require a bit more authority in their bit without the harshness of some other options. The ability to use two reins allows the rider to adjust the amount of pressure applied, making this bit suitable for various riding disciplines.

On the other hand, the Kimberwick is a bit that provides some leverage but does not have the same kind of dual rein control that the Pelham has. The Gag bit works differently by allowing the bit to slide up the reins, which can cause a lifting action but does not apply pressure in the same way as a Pelham. The Happy Mouth bit, while designed for comfort with a softer material, does not feature leverage mechanics that target the chin and poll in the same manner as the Pelham.