Tectus® is the most versatile concealed hinge system available anywhere. Because these german-engineered hinges are easily adjusted in 3-DIMENSIONS, premium flush doors can be installed and maintained absolutely, perfectly flush, with no more costly call-backs. Tectus® hinges offer capacities for doors from 88lbs to 440lbs with two hinges installed. They are available in a wide range of architectural quality finishes. Index-d provides installers with the tools and technical assistance to integrate this state-of-the-art hinge into their workflow.