Medeco® Mortise 10/10T cylinders provide patented key control and the Medeco3 version provides UL437 Physical Security in adaptable retrofit cylinder formats. Medeco® Mortise cylinders have threads on the outside of the shell and are designed to be screwed into other manufacturer’s mortise lock cases. A cam on the back of the cylinder operates the lock mechanism and a set screw holds the mortise cylinder in place. 10 series, rim and mortise cylinders, are UL437 Listed for drill and pick resistance, and the those that incorporate the Medeco3, BiLevel, or Medeco X4 design, offer utility patented key control.