Shires Double Jointed Copper Lozenge Pelham. The Double Jointed Copper Lozenge Pelham bit combines the action of a curb rein with a snaffle bit. The Pelham is more severe than other snaffles as it has a leverage affect on the jaw which helps to give the rider more control. When the snaffle rein is attached to the pelham it helps to lift the horse whilst the curb rein helps to encourage flexion. The double joint with copper lozenge will soften the nutcracker action and assist with salivation.