Axe .166 Micro Diameter Bolts - Length: 17.38 - Fusion XII SL Vanes - Approx. Weight: 414 Grains (including Lit Nock and 100 grain point) - Axe Green Lit Nock - Crossbow String Activated - Injection Molded - Super bright LED - 20+ hours - Approx. Weight: 44 grains - Contains 3 bolts and 3 lighted nocks - Axe Crossbows and Nockturnal lighted nocks now in a custom-created 3-pack of bolts and lighted nocks. - Axe Crossbows� .166 micro-diameter bolt system the Axe Combo Bolts with Lit Axe Nock 3-Pack system is custom fit for Axe crossbows. Cut to length to fit each crossbow model respectively the combo system features the proprietary .166 micro-diameter shaft fletched with three Fusion XII SL Vanes and the super-bright Axe Lit nocks. The metal injection molded Lit lighted nock system creates an audible click when properly secured to the crossbow�s string. The super-bright LED system is initiated by the forward movement created by the strings forward movement to engage Nockturnal�s patented crossbow string-activated linear switch with piston-driven assembly. These lighted nocks are exceptionally reliable and do not require any specific tools to set up and come factory-installed in the shafts. Side illumination ports on the nock�s body allow for additional light dispersion and increased �tracking� as the nock moves. With more than 20 hours of lithium-powered battery life the extended burn time grants plenty of opportunity for reuse and easy identification long after the shot.