Traffic Jam Plastic Grunt Call The Traffic Jam Plastic Grunt Call offers outstanding versatility, allowing you to produce mature buck grunts, young buck grunts, doe grunts, estrous bleats, and fawn bleats by simply adjusting the internal O-ring . The plastic barrel delivers crisp, realistic grunts while still providing the ability to produce high-volume grunts , including aggressive buck growls , when the situation calls for it. Durable and easy to run, this call performs reliably in all weather conditions. From subtle calling to aggressive sequences, the Traffic Jam Plastic Grunt Call is built to help you bring in the buck of a lifetime .