Primos has taken the design of their medium frame mouth calls one step further with the Hacked Off Mouth Call. Printed lines on the tape help you customize the size of the call to achieve a more perfect fit to the roof of your mouth. This creates a tighter seal and increases the amount of airflow over the reeds for better calling. Sawtooth cut for high-pitched, clean yelps. Don't just get mad at calls that won't fit your mouth, get Hacked Off.