The Rightline Gear Foam Block Kayak Carrier attaches to vehicles WITH or WITHOUT a roof rack. Attach the carrier’s straps to a vehicle’s roof rack or use the Car Clips to attach the straps to a vehicle’s door frame weather molding. This Carrier does not require straps to run through the inside of the vehicle! The Kayak Carrier’s Dual Lock Straps secure the Foam Blocks to the rack or roof so they don’t shift during transport. The same straps secure the kayak to the Foam Blocks for increased stability. The Foam Blocks have a v-shaped top to safely cradle the kayak. Rubber guards protect the vehicle and kayak from the metal cam buckles on the straps. The Foam Block Kayak Carrier makes getting your boat to the water easy!