If you have a Rola* Commercial Bar system and want to mount a number of Rhino's kayak and canoe carriers including the S510, S512 or the Kayak Extension Piece S512X you will need the KC-FK9 fitting kit.
The kit comes with all the necessary items including screws, washers and other pieces to attach the kayak carriers to your Rola Racks.
Features:
Your Kayak Carrier Fitting Kit (Commercial Bar) solution can be equipped with these