The Fulmer cheekpiece, will have the same effect as the traditional Eggbutt in so much as, it will prevent pinching on the sides of the mouth, however the extended pins above and below the bit, firstly prevent the bit being pulled through the mouth and secondly have the effect of guiding the horses head which is great for schooling and training purposes.
The Loose Rings make the bit less fixed in the mouth which encourages mouthing and acceptance of the bit, while retaining the turning advantages of the full cheek.
The Colin Miles is a great schooling bit with a 55mm centre 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.
This particular joint exerts more pressure than the Control Plate or Elliptical.