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The Von Duprin Wood Door Concealed Vertical Rod Device Series 5547 provides an excellent exit strategy for situations where the exterior of a door is locked. Available in seven color finishes, ensuring a suitable match for any decor. Von Duprin, originally marketed in 1908, has been providing the highest quality in door safety and exit hardware for over a hundred years. This and all Von Duprin products inspired by the Iroquois Theatre fire in Chicago, 1903.