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 while still allowing for individual lateral aids.
The Eggbutt cheek piece prevents pinching of the lips and gives a solid feel against the side of the face. It also prevents the bit being pulled through the mouth. The release is slower than the loose ring and also introduces light poll pressure.Â
 All Bomber bits are made from blue sweet iron, because it:
oxidises easily, encourages salivation, helps bit acceptance and is warm and sweet.
Please note that due to the oxidisation the blue will fade with use.