Clean-Shot Nock Out Crossbow Half Moon Nock Yellow 3 pk.. These light-up nocks allow you to visibly follow the path of your arrow and monitor where your shot hit the animal. Light-up nocks and Crossbow Parts also make finding pass-through or missed arrows much easier to find. Watch your arrows fly thanks to the Clean-Shot Nock Out Lighted Nocks. Specifications for Clean-Shot Nock Out Crossbow: Manufacturer: Clean-Shot Additional Features: 3 pack Features of Clean-Shot Nock Out Crossbow: Designed for CARBON shafts & will not work in aluminum They will not fit a carbon shaft smaller than a .285" ID such as the GT Nitro Simply pull the nock straight back until you hear a soft "click" and the LED turns off - no tools or magnets A simple 1/4 turn of the activation collar deactivates the LED during practice Choose either flat or half moon nocks Package Contents: Clean-Shot Nock Out Crossbow Clean-Shot 85-1071: Nock Out Crossbow Half Moon Nock Yellow 3 pk.