NAP Thunderglo Lighted Nocks have ultra bright LED illumination and feature an easy on/off feature. Thunderglo Lighted Nocks are crafted of a polycarbonate blend with an aluminum shaft making them extremely durable for long lasting use and life expectancy. Universal collars will allow Thunderglo Nocks to fit most any arrow (G/X/H/S).

Features:Polycarbonate blend Nock with aluminum shaft;Bright LED Illumination;Auto ON when nock is shot;LED Stays ON until user unclicks the nock;Universal collars fits Arrow Shafts (G/X/H/S)