Make it easier to follow the path of your Muzzy Carbon Composite Fish Arrow (not included) in the water with the Nockturnal Lighted Nock for Muzzy Carbon Composite Fish Arrows. This dependable, accurate, and consistent illuminated nock combines a bright, built-in LED light with a fail-safe, string-activated, piston-driven linear switch located deep inside the nock. Made of a clear plastic for super visibility, this weather- and waterproof green LED-illuminated nock can be seen underwater to help you follow the fish after a successful shot. Offering more than 20 hours of battery life, each nock lasts long enough to help you find your arrow. X-Nock design fits Muzzy's durable Carbon Composite Fish Arrows (not included). Lighted nock for Muzzy Carbon Composite Fish Arrow (not included) Dependable - string-activated linear switch located deep inside the nock Clear plastic for super visibility Weather- and waterproof green LED Helps you follow the arrow underwater X-Nock design