Duke Concealed Door Closer is mortised in the Door Panel by cutting notches, which is put into every Door Closer. Everite Agencies Pvt. Ltd. Manufactures Duke Concealed Door Closer. Everite Agencies Pvt. Ltd. Also offers Door Closer and Aluminium Anodized Builder`s Hardware. Duke Concealed Door Closer can also carry a Door weighing 60 kg. Width 850 mm. When the Door is opened beyond approx 90 degree an integral delay function slows down the closing action for a period to allow convenient passing through. This feature is particularly useful for Hospitals, Retirement Homes. The sweep control adjusts and regulates the speed of the Door through the main Arch of the closing sweep to suit individual needs.