Primos RubberNeck Deer Call. With the push of a button, the RubberNeck converts from a mature buck grunt to a young buck grunt or even an Estrus doe bleat. There are many times when you think that a buck won't respond to your grunt, its because he can't hear you. If you bleat at him first to get his attention and then grunt at him, most of the time he will respond. Just squeeze the end of the RubberNeck for realistic inflections and volume control. You can use the RubberNeck with the traditional lanyard or strap it to your arm. Primos Model No. 737.