metalab pelham bit high port copper rollersStainless steel with copper rollers and a high, sliding port for stronger, more powerful control The high, sliding port acts on the palate to help close the head neck angle, encouraging poll flexion The combination of copper and rollers encourages the horse to mouth the bit and salivate, promoting relaxation of the jaw Leverage effect can vary depending on where the reins are attached This mouthpiece can be used with 1 or 2 pairs of reins or Pelham