Assa Abloy is the world's largest supplier of locking and physical access solutions, sporting the world's largest installed base of locks that protect some of the most security-sensitive buildings, such as the European Parliament in Brussels. Some 70% of the group's revenue is derived from commercial, government, and other nonresidential customers. The company's product base is centred on electromechanical locks, which require identification to unlock with a keycard, biometric scan, or personal identification number. Assa Abloy's products are sold directly to security systems integrators, locksmiths, hardware stores, and original equipment manufacturers.