This week I'm going to cover the French link mouthpiece. I like the French link for several reasons. First, and most importantly, it eliminates the nutcracker action of a single jointed snaffle. It is also perfectly symmetrical, unlike the central joint of a single jointed snaffle.
The flat and wide link allows pressure distribution over the tongue, and alleviates some of the pressure on the bars and lips. I have found most horses prefer this, because they can move the bit more easily with their tongue to where it is comfortable.
One cautionary note with a French link is to ensure it is the proper width for your horse's mouth. While we would hope that all equipment anyone use would be properly fitted, a French link that is too wide can pinch the lips and edge of the tongue, which is obviously very painful.