LAUNCHPAD ILLUMINATED PRECISION NOCKS, ACCURATE. FAST. PRECISE. Top shooters know that nocks are an important component of consistent, accurate arrow flight. This insight led Carbon Express engineers to develop the patent-pending LAUNCHPAD Precision Illuminated Nock. The LAUNCHPAD performance design is the perfect combination of weight, brightness and battery life. Features: Precise contact points for controlled arrow release; Aligned nock barrel for true arrow flight; Concentric design to center the nock in the arrow shaft for more consistent performance; Lightest weight and perfectly balanced for superior accuracy; Lightweight design does not reduce arrow front of center (FOC); High visibility LED; Long-life battery. Red (8 hours), Green, Blue and Pink (50 hours); Release activated; Each nock is manufactured to the highest standards and engineered with four-axis straightness within 0.001". This means that each nock will shoot the same, shot after shot. Cross bolt Nock. 3 pack. Blue. Model 58080.