The Slingblade Box Call is a single-sided box call that is constructed of a solid billet of American Walnut with an exotic Purple Heart lid. With only one striking side, the open-close operation is fool proof. The off side is taller, which stops the paddle in the same place every time. Like the open and closing of a door, rhythm and cadence is all you need to master. The hand-tuned Slingblade produces fine turkey talk every time.