Like a big buck?s chest, the mouthpiece carries some weight to it. The revolutionary ?TrakeTube? is constructed to mimic a buck?s trachea. The hard, reverse cone on the end resemblesthe mouth of a buck. These three attributes produce the most realistic buck grunts ever. Oldor young, loud or soft, tending to aggressive, the revolutionary Brawler is the most advancedgrunt call ever developed.