5 3/4" Mouth6 1/2" CheekDesigned For the Stronger HorseProvides Poll PressureCopper Roller MouthpieceSmooth BarsBRB-203This shank is designed for the stronger horse who still needs the flexibility of the gag cheek. The longer shank and gag action provides more poll pressure which encourages greater flexion and gives you more control. The three piece smooth dog-bone with a copper roller mouthpiece is comfortable as it lies across the tongue. The smooth bars offer a softer feel. Copper roller provides entertainment for a busy horse and promotes salivation.