Four aluminum posts with metal feet and pre-drilled holes create a stable base for this retractable pergola canopy shelter, forming a 10 x 12-in shaded area for barbecues, picnics, or outdoor lounging. The powder-coated metal frame helps resist rust, while the yarn-dyed fabric canopy offers waterproof and sun-proof coverage over your patio or yard. A rope loop and five pulleys on each side let you smoothly open or retract the canopy to adjust shade, and a locking system helps keep it securely closed when needed.