I HAVE USED AND TESTED THEESE WITH GREAT SUCCESS.
 
Lights Out “Final Cry” Predator Calls are built with double stainless steel reeds that are tuned for a raspy cottontail in distress sound. They have received high acclaim in the Midwest, Rockies and Northeastern states. The body of the call is designed to be cradled between thumb and forefinger, allowing the middle, ring and pinky fingers to be used to manipulate the tone and volume of the call.
 
video link on this call copy paste link 
https://youtu.be/bdH5qfdj7Yk