These tone boards are made by hand from my own blanks when you place your order, so it may take a day to get them ready to go. Each tone board fits a 1/2" bore with a press fit. They are pre tuned and ready to go. Just plug, play, call coyote, and you should be able to handle it from there! Great full range of sound, smooth transitions, young howls, bird chirps, rabbit distress, fawn bleats and more. Very easy to blow for the first time predator hunter. A great tone board for you predator calls.