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AN256: Fundamentals of Bit Selection and Use

Figure 2. Examples of different mouthpieces found in a snaffle bit. The top example is a bit that is broken in more than one location and, therefore, shapes around the tongue, distributing pressure more equally over the tongue and bars. The example second from the top shows a bit that is broken in one place, thereby placing pressure more on the bars of the mouth. Third from the top shows a bit with a mouthpiece that is not broken and, therefore, places pressure more across the tongue and less on the bars. The bottom example shows a barrel-hinged mouthpiece that is a limited range-of–motion, three-piece mouthpiece.