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.The Lock Up snaffle removes the nut cracker action of the conventional snaffle, meaning it will bear less pressure on the horse’s bars. The Lock Up is therefore a softer option, than a conventional snaffle, although it still applies tongue and bar pressure when the reins are taken up.
