I had bought a 3 pack of blue lighted nocks and when I went to use them last week none of them would work, so I called G5 up and they told me that they had problems with them so they sent me 3 replacement ones in red no questions asked. I've been using G5 products for years now and I still can't get over the fact on how well they stand behind their product! Some of the companies out there just won't do this. Thanks deerman69