The EVO-X Lighted CenterPunch Premium Carbon Crossbow Bolts with Alpha-Brite Nock combine superior performance with superior visibility when it counts. Made of a strong modulus carbon fiber, these 20 bolts come wrapped in an exclusive LAZER-TECH carbon weave that increases spine consistency by 80% and overall strength by 40%. Outfitted with TenPoint 3-piece Alpha-Brite lighted nocks, these bolts feature shot-activated illumination to help you see the bolts flight path and find it afterwards. Fletched with slightly offset 3.5 Bohning X Vanes for maximized downrange accuracy and optimized consistency. Fitted with an 84-grain insert. Per 3. Length: 20. Straightness tolerance:.001. Wt. tolerance:1 grain. F.O.C.: 17%. Inside dia.: .297. Cancer and Reproductive Harm- www.P65Warnings.ca.gov. Type: Carbon Bolts.