National Custom Hollow Metal has been manufacturing custom-built stainless steel doors and frames for over 50 years, and we offer industry-leading turnaround time on all of our products. We can give you a quote in two hours or less, and we’ll ensure that your doors and frames are shipped on schedule. Our products include lead-lined doors, Sound Transmission Control (STC) doors, and even ballistic doors that are capable of stopping a .44 Magnum round! DefendDoor stainless steel doors and frames have been our top-selling product since day one, and we stand behind your order with a one-year warranty!