These spools allow you to add versatility to your Indian Chief Classic. They simply replace the fender strut mounting hardware and let you quickly attach the Soft Saddle Bag (PN28799917-02) and the deluxe quick release passenger backrest(2879725-156 or 2879737-156). This Accessory is Designed to Fit the Following: 2018 Chief --, 2018 Chief Classic, 2018 Chief Dark Horse, 2018 Chief Vintage, 2017 Chief Classic, 2017 Chief Dark Horse, 2017 Chief Vintage, 2016 Chief Classic, 2016 Chief Dark Horse, 2016 Chief Vintage, 2015 Chief Classic, 2015 Chief Vintage, 2014 Chief Classic, 2014 Chief Vintage,