The Nockturnal Shift Universal Easy Off Nock System with FIT Technology sets a new standard in lighted nock design. These lighted nocks offer unparalleled simplicity and reliability, featuring an external on/off switch that allows for effortless control. Just slide the switch to turn off the ultra-bright, string-activated LED light. With a durable polycarbonate casing, these nocks are both waterproof and shockproof, ensuring they withstand the toughest conditions. Boasting over 20 hours of battery life, the Nockturnal Shift FIT lighted nocks are designed to last. The patented, piston-driven contact linear switch activates the light immediately upon string release, providing instant illumination.

Features:Super strong clear polycarbonate construction;Waterproof and shockproof design;Easy on/off light system with external switch;Available in Red, Green, Red/Green Strobing colors;Fits X, H, S, and GT arrows;H (white bushing) fits .233 ID shafts;GT (black bushing) fits .246 ID shafts;S (gray bushing) fits .244 ID shafts;X (no bushing) fits .204 ID shafts;Each nock weighs approximately 25 grains;More than 20 hours of lithium-powered battery life;Package includes three lighted nocks, H bushings, GT bushings, and S bushings