Seven-Style ShankHinged PortCopper Center RollerProvides Lateral Control of PollCopper Roller1 1/2" Port5 1/4" Mouth7" CheekAVB-222Make this Bob Avila Byron Shank Collection Professionals Choice Swivel Port Bit your next favorite bit. This bit features a seven-style shank that prevents the horse from "lipping" the bit. This bit provides lateral control of the poll and the copper roller to keep the horses mouth moist. 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 horses safety and well-being. This leadership position has earned Professionals Choice the respect of top trainers, professionals and everyday horsemen all over the world.