Barnett's popular HeadHunter arrows just got an upgrade with innovative strobing lighted nocks. These rugged polycarbonate half-moon nocks feature multicolored strobing lights tested to outperform static lights when identifying shot location and retrieving arrows in lowlight conditions. The arrows use a pressure-sensitive design to begin strobing on impact and they'll continue strobing for up to three days. When not in use easily disable the strobe lights with an on/off toggle switch at each arrow's nock base. No assembly required begin using the HeadHunter 20 Lighted Arrows straight out of the box. Includes three arrows per pack. - For use with any crossbows compatible with standard-diameter crossbow bolts supporting half-moon nocks - 13.78 grains per inch - Fully assembled with multicolor strobing lighted nocks - Tested for durability - Continues strobing for up to 3 days - Easy on/off toggle switch in nock base - 20-inch arrows (also available in 22-inch length) - Three arrows per pack