The Weymouth non-fixed is used together with bradoon, so you get a double bridle. The Weymouth non-fixed is a cheekpiece with leverage effect. The Weymouth can move up and down, making the aids come through more indirectly. For this combination, you need a double bridle or an extra cheekpiece. This bit comes with a curb chain to prevent the bit from rotating too far. The curb chain should be well-fitted
An arched mouthpiece is a straight mouthpiece that is slightly bent. Because of the forward bend in the bit there is room for the tongue. This mouthpiece exert even pressure on the complete tongue. An arched mouthpiece has a sharper effect than a jointed or an eliptical mouthpiece.