The True Double is in Primos' Piggy Back Series, meaning it has one frame stacked on top of another. This gives you 0.0625 in reed separation so your reeds donâ€™t stick. Wanna make that bad boy strut? Well, with the True Double you can do just that. It is a very easy call to use. It produces turkey talk with a true turkey rasp and tone. It also makes raspy yelps, clucks, cuts and cackles.