The Nockturnal Launchpad Strobing Red/Green Crossbow Nock 3pk NT-780 is built to deliver exceptional visibility and performance for crossbow hunters. Featuring a strobing red and green LED that alternates colors, these lighted nocks make tracking your bolt’s flight easy in low-light conditions. An adjustable barrel end ensures a custom fit for nearly any crossbow bolt, while the rugged, impact-resistant design guarantees lasting durability. With over 20 hours of battery life, the Nockturnal Launchpad Strobing Nock is a must-have for any dedicated crossbow hunter.