Knight & Hale EZ Grunter&nbsp; Xtreme Deer Call Patented Hyper Ventilator design for optimal inhale/exhale-style operation Shortened endpiece for ease of disassembly Changeable wedge, reed and sound board Reed locks into place, allowing for factory condition reassembly Extensively tested and proven in the field by some of the industrys best whitetail hunters, who refer to it as their go-to call