100 percent carbon crossbow bolt with Lumenok lighted nocks installed. Bolts are squared on the nock end to ensure proper functioning of the lighted nock. Factory fletched with 2 Balzer vanes. Length: 20. Includes brass inserts. Weight: 338 gr. (without point). Features:100 percent carbon;Squared on nock end to ensure proper functioning of lighted nock;Factory fletched with Bohning Blazer Vanes;Includes brass inserts and lighted nocks