Material: Copper, Stainless Steel, Sweet Iron. Mouthpiece: Double-Jointed. Durable. Encourages Salivation, Prevents Pinching, Prevents Rubbing, Produce Pleasant Taste. Encourages Softening, Increased Control, Lessen The Nutcracker Action, Prevents Horse Taking Too Much Hold, Strong Construction, Works On Bars And Tongues, Works On Chin Groove, Works On The Poll Corners. Suitable for: Strong Horses, Young Horses. Ref: UTER544