Double-jointed egg-butt snaffle made of Sweet Iron with a round middle piece.  With an egg-butt snaffle, the rings of the bit cannot freely rotate through the mouthpiece, this makes the effect slightly stronger than with a loose ring snaffle.  It is a bit quieter in the mouth than a loose ring snaffle.  The double-jointed mouthpiece shapes itself to the mouth of the horse.  The pressure is distributed over the middle of the tongue and the bars, because the middle piece is round, the pressure on the tongue is less sharp.