The Sawtooth Green Machine grunt call has an adjustable tube that allows the user to modify the pitch to make a variety of sounds to help get the attention of cruising whitetail bucks. And it is user-friendly — a good grunt call for beginners as well as treestand warriors attempting to call in the buck of a lifetime. The Green Machine is 7 inches long when compressed and 10.5 inches when expanded so it will easily fit in a chest pocket or backpack compartment, or can be used on a lanyard. MSRP: $14.99. Contact: www.sawtoothgamecalls.com