The VIER CYLINDERS V5 60mm Euro Single Cylinder in Polished Brass offers exceptional security for fire-rated doors (FD30-60). This premium cylinder features advanced anti-drill and anti-pick protection, along with a break-off system that prevents forced entry by snapping the external section while keeping the internal mechanism secure. Keyed to differ, each cylinder operates with its own unique key, making it ideal for multi-occupancy buildings or where individual key control is required. The polished brass finish provides an attractive, traditional aesthetic that complements period and contemporary door furniture alike.