Professional's Choice Equisential Twisted Wire Dogbone Wonder BitThe Wonder Bit is a very versatile gag shank The siding mouthpiece moves forward engaging poll pressure allowing for more lateral flexion and shoulder elevation Can be used with a martingale or double rein This mouthpiece will apply more palate and bar pressure An excellent all purpose mouthpiece which will work well on most horses. The sweet iron keeps a horses mouth moist NOTE: This bit will rust when exposed to moisture This creates a sweet taste