Nockturnal lighted nocks are a breakthrough design that combines ultra-light performance with a high visibility light source and "instant-on" simplicity that activates upon release. The patent-pending string-activated "hidden linear switch" is protected deep within the nock and will not turn on or off inadvertently. Battery life is over 20 hours.
Nockturnal S - Fits most "standard sized" carbon hunting aarrows such as Beman ICS, Easton, Carbon Express, PSE, Carbon Tech, Victory, Carbon Impact & most other arrows including aluminum arrrow with a super-UNI bushing
Nockturnal G - Fits Victory VAP, Easton AAC and Injexion or G-UNI
Nockturnal H - Fits ST Epic, ST Excel
Nockturnal X - Fits slim arrow with half outs or hidden inserts such as Easton Axis and Full Metal Jacket, Beman MFX, Trophy Ridge, Carbon Impact HOT, and Easton ACC with X-UNI bushing
Nockturnal GT - Fits Gold Tip hunting shafts