This is a curved mouthpiece with an upward and forward bend, two hinges and centre piece with barrel for Independent Side Movement. There's no restriction in degree of collapse. This offers lots of tongue relief to the compliant horse but will put downward pressure on top of bars when activated, followed by downward pressure on tongue and inward collapse on bars. This can also work well for the strong horse with head down low or into chest. Encourages horse up into bridle.