Anatomy-inspired double jointed bit design with enhanced mouthpiece stability, through optimised alignment of the mouthpiece surfaces to the tongue and palate. The Neue Schule Flex design concept delivers a guaranteed and well controlled co-alignment of the surfaces of the mouthpiece with the sensitive surfaces of the equine mouth. For most designs Flex delivers parallel co-alignment of the Turtle Top™ dome with the equine palate. In selected designs we allow Flex to deliver some firm but fair additional pressure to the tongue and poll using a lever action-induced rotation of the mouthpiece. The extra pressure obtainable is carefully restricted with Flex limiting the range of additional rotation to around 10 degrees.