AAE Bitz Nock Receiver Crossbow Precision vane spacing for crossbows, compatible with Bitzenburger fletching jig;Offers two vane spacing options: 3-vane (120 degrees) and 4-vane (90 degrees);Designed to align and retain most modern crossbow bolt/arrow moon drivers and nocks;Features a set screw for single vane repair alignment;Direct OEM knob replacement;Not compatible with Ravin crossbow nocks (requires Bitz Knob Standard 3-4)table.productattributes, .productattributes td { border-bottom: 1px solid #ddd; border-collapse: collapse; padding: 2px; text-align: left; } Item Category Code: 1200 Product Group Code: 1200A Product Sub Group 1: 1200A2 Inactive: No