Knight & Hale Dual Threat Glass & Slate Turkey Pot Call Flip-sided design allows hunters to quickly change their tone and sound with minimal movement-get more Calls, with less equipment Glass side generates high-pitched Tones with unmatched Volume for long-range and windy-day calling scenarios Slate side creates rich, mellow Tones and sounds with depth, perfect for short-range calling Includes the patent-pending diamond wood striker-completely waterproof with an internal resonator to produce vibrations between the striker and the surface for purer, more natural sounds with all friction Calls