The Kolpin KXP Rear Trail Box Mounting Kit is a set of brackets that will securely mount your Kolpin Trail Box to your Polaris ATV front composite rack that is using the Polaris Long & Ride System. With this kit, you will have quick and easy attachment/removal of your rear rail box. Fits:Polaris ATVs with composite rear racks using the Polaris Lock & Ride System ONLYKolpin Rear Trail Box (sold separately)Package Includes:(2) Mounting brackets(4) KXP ATV plungersAll necessary hardware