Rhino-Rack's DK kits are used in all the 2500 roof rack systems. The kit consists of the pads and clamps which attach to your vehicle's roof. The kit includes 4 pads and 4 clamps., Rhino-Rack's DK kits are used in all the 2500 roof rack systems. The kit consists of the pads and clamps which attach to your vehicle's roof. The kit includes 4 pads and 4 clamps. Replaces Pad And Clamps On Rhino 2500 2 Bar Roof Racks. Durable Vehicle Grade Santoprene Pads. Strong Anti-Corrosive Black Metal Clamps. .