The Weather Guard ATR Aluminum Truck Racks are made with strong, lightweight extruded, anodized aluminum. The ATR mounts to the top of the bed rail with compression clamps. Triple-wall extrusions and corner brackets on all four uprights create a strong and lightweight rack. * Accessory Side Rails for over cab protection & load capaity increase. * Four easily adjustable ladder stops included to help secure ladders and materials. * Anti-wear strip reduces wear on ladders and protects rack. * Easy to install compression clamps secures rack to top of truck bed. * Upright legs bolt to mounting rail for easy removal. * Available in Full & Compact sizes