The most precise jig on the market. Place 3 vanes perfectly 120 degrees apart with one flip of the lever! This jig will fletch almost any size shaft with press fit nock removed, pin nock removed from pin, or crossbow bolt. Fletches 3 vanes at one time up to 2.25 inches in length on a 3° right helical. Helix Tower includes 5 center post options: Standard Carbon(.240 id), A-Nock(.201 id), F-Nock(.164 id), Xbow Bolts, and pin nocks