More Colors!  More Styles!  More Sizes!  More Glass! Armstrong Steel Door has been fabricating pre-finished entrance door systems since 1985. Designed for long lasting beauty and superior weather protection, there is sure to be a style and color combination to suit your home. Our entrance systems arrive fully cartoned and pre-finished. All of our doors are pre-hung on your choice of two frames and include mounting hardware, oak adjustable threshold, full weatherstrip system, entry lock with deadbolt. Steel doors include a twenty year warranty. 30 years for fiberglass door units. Sizes - surfaces, Armstrong has it ... everything ... with 4 door surfaces and all sizes available. Up to 48 x 97 for single door sizes. Of course, we also carry sidelights in custom sizes to accomodate almost any combination of door and sidelight panels. This will allow the customer to have greater selection for both new construction or remodeling projects.