Norton Soft Extensor Schooling Aid BrownDurable rope in 100% polyester. This schooling aid encourages lunging in a forward and downward stretching posture. Fitted with a ring to attach the rope between the horse's legs. As with all schooling aids, it is important not to set them too short especially at the start of a session. The aim is not to restrict the horse, which would cause resistance, but to set a framework within which the horse can find its own balance freely.