Make this Bob Avila Byron Shank Collection Professional's Choice Ported Chain Mouth Bit your next favorite bit. This bit has the seven-style shank the prevents the bit from "lipping" the bit. The mouthpiece proves tongue relief and the chain is light on the bars. It lift the head an dshoulders while the port encourages collection. Professionals Choice continues to be a market leader renowned for revolutionizing the equine industry through diligent scientific research and producing the highest quality products strictly for the horse's safety and well-being. This leadership position has earned Professionals Choice the respect of top trainers, professionals and everyday horsemen all over the world.