Eff Eff Founded as a precision engineering and electrical engineering workshop in 1936, effeff is a global leading brand for electromechanical locking and unlocking devices Products Mediator Technical Brochureeffeff Technilock High Security Electric Bolt Lock/Fail Unlockedeffeff Technilock High Security Electric Bolt Lock/Fail Lockedeffeff Striking Plate Bolt Monitor Switch Contact View more Other Brands