Trust Sweet Iron Curb Gag Medium Port BitWe love this bit because it offers better control for stronger horses, as well as allowing more tongue freedom. Sweet iron develops through contact with the surface corrosion that tastes sweet and naturally stimulates saliva production. This will allow the horse to produce more foam, which is good for a better acceptance of the bit. This corroding process changes the blue color of the TRUST bits to a brownish grey color. During a temporary non use of