Sprenger's Flex Control bit is a single-jointed loose ring snaffle bit with a difference. The central mouthpiece joint is covered with rubber to provide a smooth and gentle flexion. This makes the joint itself much smoother and gentler on the horse's tongue and also limits how far the bit pivots in comparison to a regular single jointed bit. The Sensogan material on the mouthpiece warms up quickly and encourages softness and salivation. 18mm thick mouthpiece with 70mm rings.