By fire door hardware we mean all the elements that take place in tests of resistance against fire in doors, such as locks, hinges, door closers, handles, panic bars, etc. The purpose of these fittings is to keep the door closed in order to avoid transmission of smoke and gas and prevent the flames and heat from entering. So you need a complete door hardware solution for conduit shaft. D&D Hardware door hardware solution does just that for you. As an complete solution, you can view the popular door hardware combination for safety.