Product Description: The new PISTON SR packs all the award-winning technology of our PISTON and turns it into a roof rack that would make even a pro tour motorcade jealous. Features: All metal construction Genuine Kashima Coat on struts Compatible with most aftermarket and factory crossbars One Tap hydro-pneumatic struts Fast Fit Tool Free Wheel Chock System Integrated high-strand 12mm cable lock Stainless automotive grade hardware finishes PISTON SR 2" Hitch Mount Adapter available