Happy Mouth King Dee Copper Roller Bit Pure copper is a soft, warm metal. The taste of copper encourages horses to salivate and keep a moist mouth. Bits made of copper can have a very positive effect by promoting relaxation and softening. This bit uses 99.9% pure copper in the center of the mouthpiece combined with an apple-scented space age polymer to improve bit acceptance. Features: Taste of copper encourages horses to salivate and keep a moist mouth Copper can have a very positive effect by promoting relaxation and softening Apple-scented space age polymer mouthpiece Item Specifications: Material: Stainless Steel