Cork Battery Stop Kit Today's faster bows and harder targets have created situations that require a more robust battery holder than our Lumenoks have. Adding more mass/material to the Lumenok assembly would only make it more prone to failure. This will necessitate a stop that won't interfere with the replacement of batteries. These are easy to install and we supply all you need to prepare 6 shafts with each kit. They come in 2 sizes. One for crossbow bolts and one for standard diameter arrow shafts. Please watch the "Cork Battery Stop" video on our HOW TO page. https://lumenok.com/pages/media