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dormakabas RTS 85, RTS 88, and BTS 84 Series concealed door closers offer a solution for installations where door control must be provided without disturbing aesthetic appearance or compromising durability. They can be installed a number of different configurations, including in standard, narrow or wide door frames, as well as with left-hand or right-hand single- or double-action mounting. The closers are designed for a wide variety of doors and represent an excellent alternative to surface-mounted closers. A comprehensive selection of accessories ensures that they can be used successfully with a wide variety of door constructions and floor coverings. Product benefits include: • For the trade: Just one body for all types of fixing. Low retrofit applications to replace surface-mounted closers. They are not intended for use in fire or smoke doors. Technical Data The concealed door closers employ a cam and roller mechanism, and are capable of controlling interior and exterior doors. They are non-handed, with a single closer for both single and double-acting doors. Users can adjust closing speed and optionally take advantage of mechanical hold-open points. The plant in Suzhou is certified to the quality management system ISO 9001, which ensures consistent quality of dormakabas products. The Environmental Management System in the Suzhou production is certified to ISO 14001.