Rocky Mountain Ax10004 Axe 440 Bolt Combo Pack Gray/Orange/White 19" 3 Bolts And 3 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 crossbows String. The Super-Bright Led System Is initiated By The Forward Movement Created By The strings Forward Movement To Engage Nockturnals 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 nocks 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. Model: Axe 440 Length: 19" Weight: 434 Grains Color: Gray/Orange/White Misc: Super Bright Led Nocks Quantity: 3 Bolts And 3 Lighted Nocks Vane Type: Fusion Xii SL Manufacturer: FERADYNE Inc Mfg Number: Ax10004 Model: Axe 440 Series: Bolt Combo Pack