The Mullen is a strong bit which creates direct pressure on the tongue.
Used for a strong older horse and will also bring the head down.

The Corkscrew mouthpiece is grooved to offer extra control over strong
horses. The groove in the mouthpiece causes edges that result in
pressure points in the horse's mouth. The edges amplify pressure on the
mouth, especially the bars and tongue, and also act on the lips. This
offers the rider more control than a smooth mouthpiece, and can help to
prevent the horse from leaning.

The mouth piece is made from blue sweet iron, because it:

oxidizes easily
encourages salivation
helps bit acceptance
is warm and sweet

The Polo Pelham is supplied with stubby curb hooks and a flat link polo curb chain.

The Bomber Blue includes orange rubber bit guards.