🌟 Light Up Your Game: Elevate your archery experience! Compatible with arrows of various inside diameters (.165 to .246). No assembly required—just screw in and go! Weighing only 0.05 pounds, it won't weigh you down. Never lose track of your arrows again, day or night! Bowstring-activated on-off switch for seamless use. Night vision ready 48h battery life Screwdriver included The 6PCS G X H S GT Led Lighted Nocks are designed for archers who want to enhance their tracking capabilities. With a bowstring-activated on-off switch and a battery life of up to 48 hours, these nocks ensure you never lose sight of your arrows, whether in daylight or under the stars. Compatible with various arrow diameters and easy to install with the included screwdriver, these nocks are a must-have for any serious archer.