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The Tom Thumb is similar to the Ring bits or Dutch Gags and introduces poll pressure as well creating leverage on the mouthpiece. The main difference however is that instead of the additional rings at the bottom it has an extended shank with a ring on the end, this shank is bent and set to run at 45° the effect this has is to ease up the poll pressure and leverage on the mouthpiece.
Recommended for junior riders with forward going horses this offers similar action to ring bits however by having the lower ring set on a shank bent at 45 degrees, this reduces the poll and tongue pressure exerted when the rein is attached to the lower ring.
Reins can be attached at:
A- Removes the poll pressure decreasing
the mouthpiece leverage.
B- Introduces poll pressure and leverage on the