Looking for custom crossbow bolts? Lumenok gives you the option to create custom crossbow bolts without the hassle of doing it yourself. Use our Custom Build A Bolt Selector and choose your options below! Sold in 3 Packs. Our Lumen-Arrow bolts are 100% carbon shafts .300" on the ID, are +or - .002" or better straight and come equipped standard with cork battery stops installed. along with the other option that you choose. *** Important * ** Bolts longer than 21.5" will come with the nocks uninstalled. The slight decrease in length saves you $5 in shipping. We thought it was crazy too! So we decided to do this in order to keep costs down for the consumer. We are are doing everything we can to help.