Excalibur paired up with Easton arrows to bring you their 18 carbon Diablo bolt, designed specifically for use with Excaliburs Matrix crossbow. With 2 vanes, a spined design and increased front-of-center weights, these crossbow bolts deliver blazing-hot speeds and unbelievable accuracy. The included flat-back inserts eliminate the need for nocks and provide more reliable contact with the string. Per 6. Length: 18. Overall wt.: 250 grains (without point). Cancer and Reproductive Harm- www.P65Warnings.ca.gov. Type: Carbon Bolts.