Tower fletching jig allows you to fletch all three vanes at once. Includes 7 sets of arms - Straight (Up to 4â?쳌 vane), 1 degree offset (Up to 4â?쳌 vane), 3 degree right helical (Up to 2.25â?쳌 vanes), 1 degree offset (for Impulse vanes), 2 degree right wing feather, 2 degree left wing feather arms, and Mylar vane arms. Center posts for standard carbon, F nock, A nock, pin nock, HE nock, swedged shafts and crossbow bolts are also included. Three different clamping rings accept any size arrow shaft.