DHR Industries, Inc. is the manufacturer of the original permit posting system... The Doc-Box® is an all-in-one permit posting system that protects plans, permits, inspection schedules and other required notices on the job site... job after job! In use by builders nationwide for nearly twenty eight years, the Doc-Box® is a field proving, durable and long lasting product, made in the USA by DHR Industries, Inc out of Ocala, FL. All Doc-Box® products are suitable for indoor or outdoor use and its long life makes it more economical than homemade posting boards. The Doc-Box® is endorsed by Inspectors, Builders and Dealers across the nation! Doc-Box® by DHR Industries, Inc also caters to various industries for all your professional posting unit needs indoors or outdoors!