Quaker Boy® 92621 Brawler Buck Grunt Deer Call™ with Eso-TubeThe Brawler Buck deer call is Built Like A Buck. Like a big bucks chest, the mouthpiece carries some weight to it. The revolutionary ESO TUBE is constructed to mimic a bucks esophagus. The hard, reverse cone on the end resembles the mouth of a buck. These three attributes produce the most realistic buck grunts ever. Young or old, loud or soft, tending to aggressive, the revolutionary Brawler is the most advanced grunt call ever developed. Freeze proof