Product Description Wide Compatibility: The light nocks are designed to fit shafts with diameters of .165, .204, .233, .244, and .246 inches, as well as X H S, and GT bushings, making them compatible with a wide range of shafts. Durable and Long-Lasting: Made from high-quality materials, these LED nocks are designed to withstand harsh shooting conditions, ensuring your arrows are always ready for use. Enhanced Visibility: Enjoy enhanced visibility in low-light conditions, allowing you to track your arrows more accurately and improve your shooting performance. Easy On and Off: Equipped with a high-quality switch, these illuminated nocks offer easy on and off functionality, ensuring convenience and control while aiming. Easy to Install: The illuminated nocks are easy to install and are a perfect addition to any archery setup, enhancing your overall shooting experience. 3 pieces per pack