Since 1988, preferred by builders and inspectors. Self-contained, water-resistant, all-weather storage and display for signs, permits, and plans. Lasts job after job. High-density polyethylene (HDPE) plastic, assembled by hand in the USA. Pre-drilled cover snaps securely shut with a deep overlap to back, protecting against weather and dirt while preserving access to contents inside. Generous posting area and interior plan pocket. Lot and job information on cover. Available in 4 styles to meet every site need: with or without a steel-bodied cam lock (2 keys provided) and with or without a shatterproof polycarbonate window. Aluminum prop arm holds window open for ease of access and safety. Write on with a grease pencil; easy wipe-off with a light oil solvent for next job. Replacement decals and custom embossing available. Meets legal regulations for posting signage on work sites. Predrilled mounting holes and built-in alignment guidance. Mounting hardware provided.