Another great demo of the The Devastating Double being used to great effect by Grant Harrop - Best Fox Whistle ProStaffer
You can buy the Best Fox Whistle Calls here:
Best Fox Whistle SS: www.bestfoxwhistle.com/product...
Best Fox Whistle Original: www.bestfoxwhistle.com/product...
Best Fox Whistle Devastating Double: www.bestfoxwhistle.com/product...