A precision vane receiver upgrade for the pro archers' favourite fletching jig, the Bitzenburger fletching jig. This anodized nock receiver will help you achieve the most consistent and precise vane spacing, whether you shoot 3-fletch or 4-fletch configuration. The knob not only provides precise vane location, but also places the nock into the exact same location with a specific thickness with its innovative wedge design; this allows for positive nock engagement whether you use hunting or target nocks. Additionally, when you only need to replace one vane at a time, the Bitz Knob also features a lockdown indexing screw that allows the nock to rotate inside the body for a single vane repair alignment without needing to rotate the nock. Specifications Enhance your go-to fletching jig with The AAE Bitz anodized black nock receiver, suitable for 3 and 4 vane fletchings. Features a cleverly designed set screw in the nock receiver for easy single vane replacement. To affix a vane correctly, loosen the set screw, adjust the knob to secure the vane in place, then retighten and rotate to either 120° or 90° for accurate vane placement. The receiver's internal fork design ensures a stable hold on nocks, promoting uniformity in vanes across all arrows. Made from robust anodized aluminum for enhanced durability and longevity.