Professionals Choice O-Ring Half and Half
Bit
This O-ring is made out of 5/16" diameter
material. 2 7/8" outside diameter
against the extra weight in the compactness of the ring allows for a more stable
feel and quick release. The two-piece half and half mouthpiece combine a
twisted wire bar piece and smooth mouth across the tongue. This mouthpiece is softer than a complete
twisted wire.