This single-jointed D-ring bit made of hard carbon allows direct transmission of the rein aid to the horse's tongue and lower jaw thanks to its fixed side pieces. The smooth surface of the material ensures a pleasant feel, while the fixed side pieces also protect the sensitive corners of the mouth. The bit lies particularly calmly in the mouth and, thanks to the lateral limitation of the D-rings, offers valuable support when riding turns – especially for horses that tend to break out over the shoulder.

The single-jointed bit is the classic bit par excellence. It acts on the lower jaw via the tongue. When the reins are pulled, the joint in the middle of the mouthpiece rises slightly, relieving pressure on the center of the tongue and directing more pressure to the edges of the tongue. The D-shape of the side pieces frames the horse's mouth and provides additional guidance without exerting too much pressure.