Various types of metal or synthetic substances are used for bit mouthpieces, which may determine how much a horse salivates or otherwise tolerates a bit; a horse having a moist mouth is considered more relaxed and responsive. Commonly used metals include stainless steel and nickel alloys, which generally do not rust and have a neutral effect on salivation; sweet iron, aurigan and copper, which generally tend to encourage salivation, and aluminum, which is considered drying and is discouraged as a mouthpiece metal.
Various materials, including metals or synthetic substances, are employed for bit mouthpieces, which can influence a horse's salivation levels; a horse with a moist mouth is viewed as more calm and responsive. Commonly utilized metals include stainless steel and nickel alloys, which typically do not corrode and have a neutral impact on salivation; sweet iron, aurigan, and copper, which generally stimulate salivation, and aluminum, which is considered drying and is discouraged as a mouthpiece material.