Thunderglo Lighted Nocks have an ultra-bright LED illumination and an easy on/off feature. The nocks are made with a polycarbonate blend and aluminum shaft for long-lasting durability. Universal collars allow fitment to most arrows (G, X, H, S).

Features:Polycarbonate bledn nock with aluminum shaft;LED illumination;Auto-on when nock is fired;LED stays on until turned off manually;Unviersal collars fit arrow shafts (G,X,H,S)