Door and Hardware Systems, Inc. :: manufacture, fire-sealed door bottoms, seals, gasketing, frame seals, fire seals, smoke seals, sound seals, door security, door bottom, security door bottom, anti-theft device, door hardware manufacturer, cush 'n' seal, secur-a-seal, Cush 'N' Seal, Secur-A-Seal, ETC 100, edge guards, cap sweeps, hook tool, threshold, weatherstripping, Rochester NY, Internet Solutions Door and Hardware Systems, Inc. (DHSI) is a manufacturer that specializes in designing patented solutions to problems in the gasketing of door frames. While weatherstripping is the most common application, life safety and security issues are also becoming code requirements for smoke and fire, with seals, door bottoms, and thresholds. DHSI also makes a patented product for securing against unauthorized entry to rooms with commonly available tools..