Another variation of the Bob Avila Correction Bitby Professionals Choicethat is great for use on everything from young colts starting in the bridle to older, finished show horses. The shank offers somewhat of a different 'feel' than others and has a stylish look to it. Port 2", Mouth 5", Shank 8" | Professional's Choice Bob Avila Signature Shank Correction Bit | Size 5"