Material: Aluminum alloy frame with galvanized inner plate and white baked enamel finish for durability. Lock: Locking mechanism opens with standard flat screwdriver for secure access. Versatility: Suitable for hiding plumbing, electrical, HVAC, and other utilities in attics, basements, offices, and commercial spaces. Installation: Mounts on ceiling or wall using screws for straightforward setup in standard openings. Sizes: Available in multiple dimensions from 15cm to 60cm to fit various hole sizes., Manufacturer: ENmrfvkz