The Vortex SX067 leg roof rack system is designed to mount Vortex Bars to your vehicle's factory roof rails. Made with glass reinforced nylon, these durable legs are built to last. Easy to install/remove & come with security hardware to prevent theft. Pair these 4 legs with 2 Vortex Bars (sold separately) and create a complete roof rack system for all rooftop storage add-ons: kayak roof rack, bike rack, rack basket, universal roof rack, cargo rack, & more! Whether you simply don't have the space inside your vehicle, or would rather not clutter your cargo area, a Rhino-Rack roof rack will provide you with a space-saving alternative for carrying your cargo and equipment. Simply tighten the leg clamps on your vehicle's factory rails with the tool included. The rubber pads clamp securely to your side rails, securing the bars to the vehicle without scratching the factory rails. The height of these legs are just right for easy accessory installation of accessories to Vortex Bar channels. Vortex Bars are sold separately in pairs. While other brands make their legs from plastic, Rhino Rack uses high-quality glass reinforced nylon that's UV stabilized for excellent performance, longevity, and lasting durability.