Drive gobblers wild with the sounds of the Zink Calls Thunder Ridge⢠Slate Friction Turkey Call. This call is made of injection-molded latex and features a 2-piece hardwood striker, a surface-specific conditioning pad, an E-Z gripper ring and a built-in striker conditioning pocket. Includes a Turkey Time University Vol. II "Friction Calling Basics" DVD. Zink Calls Thunder Ridge⢠Slate Friction Turkey Call - Game And Duck Calls at Academy Sports