Bone Collector Ol' Faithful Deer Grunt Tube - Quick to become your faithful grunt call in you pack. The Ol' Faithful grunt call produces the sound of a dominant territorial buck looking to prove his dominance. Utilizing a top-of-the line walnut barrel to produce deep, intense tones combined with an extendable, adjustable tube creates a call that you can count on every time. Each call is expertly tuned and ready to take the woods as soon as you open it. Ol' Faithful is a classic design grunt call that will be your trusty call to deliver venison to the table. Made in USA To Use: Blow air in to the reed end of the call. Adjust the amount of air to adjust volume. The flex tube makes it easy to manipulate sound. Simply adjust the length, and direction to mimic movement or multiple bucks.