The Argentine cheeks has always been a great choice and continues to be highly popular. The only thing that can improve upon this age-tested design is Reinsman's Sweet & Sour mouthpiece! Like a green apple dipped in molasses, the combination of copper and sweet iron are very appealing to the horse, with the added bonus of increased salivation, making for a softer mouth. A highly versatile bit, it is a good transitional choice for introducing curb pressure and is a great everyday riding bit with its average shank length. Mullen relief is used on all our snaffle mouthpieces which is a forward curve that creates even pressure across the bars and tongue to eliminate the nutcracker effect.