The kit comes with all the necessary items including screws, washers and other pieces to attach the kayak carriers to your Rhino-Rack and Thule cross bars.

Features:

• Attach the S510, S512, S511Xor S512X to your Rhino-Rack Vortex and Heavy Duty cross bars
• Also suitable to fit Thule Aero and Aeroblade bars
• Comes with all the necessary items required
• Use the long channel nuts to fit to the Vortex bar's C-Channel.