The Weymouth bit is always used together with a Bradoon bit. This is a combination of two bits that are used in the higher classes, mainly dressage. The Weymouth is always used in combination with a curb chain. The rings of the Bradoon are smaller than normal, so there is enough room left for the leverage functioning of the Weymouth. For the Weymouth and Bradoon a special bridle is required or extra cheekpieces.
This combination of the two bits is used to get the head and neck of the horse in the required position. A Weymouth combination should only be used by very experienced riders and a horse that is well trained and can tolerate some pressure.
Sweet Iron - will rust when in contact with humidity (air). The surface rust tastes sweet and naturally simulates the salvation production. This will cause the hors to salivate more which will encourage the horse to take more contact.
The process of rusting (oxidisation) changes the blue colour of the Trust bit to a brownish - grey. A sweet iron bit will develop an orange-brow rust layer on the mouthpiece if it is temporarily not used. This is easily removed by wiping it off with a damp cloth.