Crafted using state-of-the-art injection-molded technology, Zink Calls' new Thunder Ridge Series Crystal Call guarantees you'll find the same quality and consistency not only in every call, but in every note. Whether at 150 yards or 15 feet, windy or calm, this innovative crystal call provides a fantastic range of sound, with one common denominator - it drives gobblers wild! The Thunder Ridge Series includes a two-piece hardwood striker as well as a piece of sandpaper for conditioning the crystal surface. It also sports the popular E-Z Gripper Ring and built-in striker conditioning pocket. Also included is a copy of Zink's latest DVD production, Turkey University - Vol. 2 "Friction Calling Basics."