Cylinders and Keys ASSA Triton²ASSA Triton² is our next generation of high security, high quality, patented master key systems. It offers the highest security with patent protection until 2036 and exceeds the requirements of BS ... ASSA P600ASSA P600 is a robust master key cylinder system for master key specifications on medium to large sized suites with patent protection until 2026 ASSA DP4400 ASSA DP2400 ASSA Twin Combi 5800 ASSA 4800 ASSA Flexcore Plus Adams Rite CL Adams Rite round mortice