Colin Miles Pelham
The Pelham 55 has attachments for two reins, one near the mouthpiece and one at the end of the shank.
The Colin Miles is a great schooling bit with a 55mm 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.
This particular joint exerts more pressure than the Control Plate or Elliptical.