One of the best calls you can carry and you have an endless supply when you think about it. The gobbler you kill always has two. They are easy to make if you don't care about them looking fancy. Cut the bones to the right length, scrape off as much meat as possible and get out the marrow, boil them in dish detergent to degrease and loosen remaining muscle fibers, soak them in peroxide, dry, get the webbing out of the larger bone (if you use it) assemble with some quick setting epoxy and your in business. After doing it a few times you'll learn the right length. I prefer a hen bone for the mouth piece but a jake bone works well also or you can just use all three of the gobbler bones. The gobbler bone mouthpiece just makes a slightly deeper yelp and cluck IMO.