3 Pack For use only on Matrix 355, 380 and 405 Excalibur's NEW Diablo illuminated Carbon arrows are designed specifically for your Compact Recurve Technology crossbow to ensure the best possible accuracy while using both fixed and mechanical broadheads. Diablo carbon arrows come equipped with Burt Coyote’s (.3015 dia. EXCF) Lumenok illuminated insert professionally installed. The Lumenok is activated by the accelerative force placed on it when shot from a crossbow. The lighted insert aids the shooter by providing an illuminated path to the target and will assist in arrow location.