The revolutionary Full Tilt Glass call from Quaker Boy is the most advanced glass pot call ever designed. The custom design pot provides a variable sound chamber to reproduce the ringing yelps, cutts, purrs and clucks that only glass can do! Deep on one end shallow on the other! The precision matched internal sound board allows for the creation of a variety of tones and volume. Soft subtle calls on the shallow end, ringing rasp on the deeper end. No dead zone on the entire slate surface.