The Nova Lighted Crossbow Bolt Nock fits crossbow bolt shafts with 0.284 in. â€“ 0.286 in. inner diameter. Installs in seconds, and the super bright red LED light has up to a 20 hour battery life. Great in any light, this illuminated nock helps you find your arrow in the dark, the brush, or the woods. The light turns off with a simple switch, using almost any small, pointed item (such as a field point or pen). No assembly required, and no glue or tools required to install. 30 grain.
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