The pacifier is often beneficial for the short smile (small distance from the corner of the lip to the muzzle), the sensitive busy mouth or tongue evasions or horses that experience difficulty in breathing and swallowing when in an advanced outline.
This bit depresses the whole of the tongue, much further back, creating a larger airway enhancing the horses ability to breathe and swallow. An indication of a restricted airway may be a tense horse that is over salivating or even making a gurgling sound. Also beneficial if tongue evasions are habitual as there is a lot less room for the horse to successfully draw the tongue back, push down on the mouthpiece or get it over the top.
Bit is very lightly used and in excellent condition.