Products We believe that today’s customers want complete solutions. They understand the security, safety and convenience that a total supplier can offer. They want a door solution where all the components work perfectly together, as a complete system. This is our dedication as a manufacturer. Master key systemsWith over 70 years' experience of designing and supplying cylinders and keys throughout the world, ASSA is established as the first choice for high security, robust and sophisticated master key... Legacy seriesAll supported master key systems by ASSA.