The DefendDoor line of custom-built stainless steel doors and frames from National Custom Hollow Metal continue to be our top seller for many great reasons. At NCHM The Difference is Quality, and you can always count on precision craftsmanship and doors that are built to last. They’re also built to order! We don’t mass-produce doors and let them sit stacked on pallets in a warehouse. When you call us for a custom quote on DefendDoor products, you can also receive a custom quote in two hours or less!