Jumpin Ashleigh Bit With Rollers And Locked Tongue ReliefShanks: 70 mm Shanks: 20 mm The Ashleigh is a derivative of the Pelham and acts more directly on the curb chain. The rollers help the horse work more freely on the bit and prevent it from leaning or bracing. The locking action of the mouthpiece allows the bit to position itself more effectively in the horse's mouth when the shanks are used.