The Leader in Custom, Quick Ship, Hollow Metal Doors & Door Frames DCI Hollow Metal on Demand is the nationwide leader in custom hollow metal and commercial steel doors and frames, manufactured to your exact specifications and ready when you need them. As fully-integrated steel door manufacturers, operating from our 100,000 square foot facility in Southern California, DCI routinely delivers custom hollow metal doors and frames when you need it. How do we do this? We have more than 30 years of experience, a trained and dedicated employee team, top quality equipment and planning tools, and most important, dedication to serving our dealer customers. We run our plant by this simple rule, What You Need, When You Need It.