Trust Sweet Iron Waterford Eggbutt BitThe Trust Waterford olive head bit is a standard side bit combined with the special Waterford mouthpiece. The mouthpiece consists of several free moving, rounded links, which do not allow the horse to lie on the bit. The recognizable blue color is the so called Sweet Iron coating. This coating oxidizes on contact with moisture and forms surface corrosion. This corrosion tastes sweet to horses and they accept the bit better and are more likely to start