Never lose track of your arrow again with the unmatched visibility of NAP Thunderglo Illuminated Nocks. Constructed with a virtually bulletproof polycarbonate body and a durable aluminum shaft, these nocks are built to survive extreme impacts and pass-throughs. The brilliant green illumination activates instantly upon release, providing a vibrant, easy-to-track flight path even in fading daylight. Sold in a 6-pack, these nocks are essential for bowhunters looking to drastically improve arrow recovery in dense timber.