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effeff Fritz Fuss GmbH & Co. KGaA manufactures electromechanical locking and unlocking devices. Their products encompass electric strikes, electric bolts, security locks, access control systems and escape route technology. The company was founded in 1936 and is based Albstadt, Germany.

Einkaufsbüro Deutscher Eisenhändler GmbH operates as a purchasing and marketing association in industrial B2B. The firm wholesales metal and plastic products for buildings. It offers structural elements, construction equipment, power tools, hand tools, steel, and wood processing machinery. The company was founded by Ferdinand Trautwein on November 11, 1931 and is headquartered in Wuppertal, Germany.

ECO Schulte GmbH & Co. KG is a family-owned company based in Germany that specializes in developing and producing high-quality door function systems. The private company's products include door closing technology, locking technology, and hinge technology. ECO Schulte believes that the whole is greater than the sum of its parts, and therefore, they strive to create fully coordinated systems that guarantee safe functioning even in extreme situations. The CEOs of the company are Tobias Schulte, Andrea Widmann, Heinz Schulte.