• [FITS ARROWS WITH INSIDE DIAMETER .204]:  lighted nocks for arrows including 5.2mm/.204, 5.92mm/.233, 6.2mm/.244, 6.3mm/.246 inside diameter
• [HIGH VISIBILITY BATTERIES ]: Shoot it at dusk, and with 30 + hours of battery life, you can still find your arrow the next day
• [NO ASSEMBLY REQUIRED]: String activated, illuminate immediately when the string is released
• [RELIABLE ]: Constructed of an ultra-strong, impact resistant PC casting
• [BANG FOR YOUR BUCK]: 6 Pack lighted nocks