Knight and Hale Plastic Pot Turkey Call Glass over SlateThe Double Up Glass Slate Pot Call pairs two striking surfaces to cover a wide range of turkey calling situations. A glass top produces loud, raspy yelps, clucks, cuts, and purrs for reaching birds at distance, while the slate bottom delivers smoother, softer hen sounds for close work. Built on a durable injection molded polymer pot, it includes a hickory striker and scouring pads to condition the surfaces and fine tune tone.