Precision Millwork LLC is a recognized member of Intertek's Certified Machiner Program, allowing them to modify Intertek Certified Fire Doors as detailed within the applicable Intertek specification listings. Precision Millwork LLC at 14300 Davinport Road-Bldg 1A Auga Dulce, CA 91390-5400 is subject to routine inspections to verify that modifications to Intertek Certified Fire Doors are done in compliance with the requirements of Intertek specification listings.