The MB 03T is a Myler twist version of the traditional French link or lozenge mouthpiece commonly used in snaffle bits with an added copper roller. The barrel distributes the pressure more kindly and creates Independent Side Movement™.
The MB 03 rotates onto the tongue, applying tongue pressure, the curved mouthpiece wraps around the bars and lips instead of pinching. The barrel in the center applies approximately the same pressure on the tongue as a traditional three-piece mouthpiece.
The port, although narrow and somewhat low, allows room for the horse’s tongue to pass under the bit. When the reins are engaged and the mouthpiece rotates onto the tongue, it applies two concentrated points of pressure on the tongue for quick control.
The MB 43HP does not rotate onto the tongue but instead sits solidly across the bars and lips of the horse’s mouth. The port is narrower than a Level 3 mouthpiece, but still offers room for the horse’s tongue to pass under the bit.