Like EVERY jig in the Tower line, the Impulse Tower Jig is the most precise way to fletch 3 Impulse vanes perfectly, simultaneously and easily. The Impulse Tower Jig fletches 3 Impulse vanes (either 3 or 4) at once, placing the vanes 120 apart and at a 1 helical. The fletching arms are interchangeable with the existing Tower models, and are available for purchase separately if you already have a Tower Jig. The Impulse Arms are specifically designed to hold the thinner hybrid material used in the Impulse vanes. The Impulse Tower includes the Standard Post, Pin-Nock Post and F-Nock Post, 2 clamp rings for small (x10) to large (fat boy) shaft sizes, and clamp release tape.