Flextone Thunderstorm Turkey Calls - 4-pack Provides an arsenal of calls. The Thunder Gobble is an irresistible intimidating gobble call that makes gobblers mad. The Thunder Cut'N creates super loud cutts and raspy yelps that drive gobblers into a gobbling frenzy. The Thunder Cluck-N-Purr tones it down with mid-range yelps and closr range seductive clucks and purrs. The Thunder Yelper has soft sexy mating yelps.