The E/Z Mount Call Holder fits snugly around your forearm or wrist. It can swivel to any position so it is always where you need it. When climbing into your tree, or walking to your stand, it is parallel with your arm and out of the way. Whin in you stand, simply rotate the call the the best position. now you can effortlessly use the call with very little movement. Works with all grunt calls. Swivels 360 degrees.