BarnettA(R)'s popular HeadHunter Bolts 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 low-light conditions. The Arrows use a pressure-sensitive design to begin strobing on impact, and they'll continue strobing for up to 3 days. When not in use, you can easily disable the strobe lights with an on/off toggle switch at each arrow's nock base. No assembly required-they're ready to go right out of the box. Rugged polycarbonate construction Multi-color strobing lighted nocks Bolts begin strobing on impact, and will continue to strobe for up to 3 days Strobe lights are easy to deactivate when not in use 13.78 grains per inch For use with any crossbows compatible with standard-diameter crossbow bolts supporting half-moon nocks Order today!