The Eggbutt Loose Ring prevents pinching of the lips and gives a more solid feel against the side of the face. It prevents the bit being pulled through the mouth. The Eggbutt Loose Ring allows quick release.
The Ported Barrel was created to relieve pressure on the tongue via the the medium port, which creates space for the tongue. The Barrel joint relieves pressure on the bars by spreading it over a larger area and limiting the nut cracker action of a conventional snaffle.