Built by hunters, for hunters. The Buck Commander grunt call is designed to match the grunts and sounds of whitetail deer 2nd to none. The adustable o-ring allows the Buck Commander grunt call to make rutting buck grunts, breeding buck grunts, young buck grunts, doe bleats, estrus doe bleats, and fawn bleats. It&';s also easy and simple to use with it&';s classic design, so you&';ll have them talking in no time. Easy to blow O-ring Single lanyard included