Key Features

The Dee Ring is similar in action to the Eggbutt, it prevents pinching and gives a slightly more solid feel against the cheeks. This prevents the bit from being pulled through the mouth. The release is slower and some slight poll pressure is introduced.
The Colin Miles is a great schooling bit with a wide center piece creating greater tongue pressure and reducing bar pressure. The rings give the horse something to play with and help keep the horses attention on the bit.

Mouthpiece

This particular joint exerts more pressure than the Control Plate or Elliptical.