twinDOOR, a member of the family-run Döring Group, brings over 60 years of experience in manufacturing high quality products. The Döring family holds more than 700 international patents in door technologies. Professional staff, leading technology and innovative solutions make twinDOOR the forerunner in the international market. More than two million customers worldwide trust and use products manufactured by the Döring family group. twinDOOR products comply to CE norms and safety standards.