The double-jointed bit focuses pressure on the tongue and bars of the mouth, while negating nutcracker and palate action found on a single jointed bit. The Bevel Bit is built with a copper brass alloy mouthpiece that's warmer and more palatable for your horse's mouth than stainless steel, yet still tough and durable.Lozenge Bevel BitDouble-jointed bitWarm copper brass lozengeAids salivationEliminates nutcracker and palate action