This Ailuyun universal roof rack clamp kit is designed for vehicles with slotless crossbars that lack built-in mounting holes. Each clamp is made of two 6061 aluminum alloy plates that tighten around the crossbar using the included bolts. This creates a strong and stable mounting point for awning brackets, tool plates, light mounts, and other overlanding accessories. The top plate features four bolt holes, providing a secure fixing position for a variety of accessories. Compatible with round, oval, and square crossbars, this clamp kit offers a no-drill, universal solution to add mounting points anywhere on your roof rack system. The full set includes 4 plates (2 complete clamps), suitable for installing awning brackets on both sides of your setup. Ideal for car camping, overlanding builds, and vehicles with smooth or slotless roof rack crossbars.