This kit includes the bolts and spacers to be mounted to your bike's fender strut. This kit is for mounting older model bags purchased before May of 2019, you do NOT need to buy this kit if you are buying new bags. You will need this kit if you are buying used bags, or if you want to be able to mount your bags to more than one bike. Note this kit will not allow you to mount bags on a different model bike than originally intended. For example, you can't mount Bags made for a Dyna onto a Sportster.