There also the federal correctional institutions (FCIs), which are a low security that have, double fenced perimeters. At the same time there are also medium security establishments. In these facilities, the prisoners are housed in cubicles in dormitory style units that have medium staffing. The final style is the administrative prisons.
These are designed to hold prisoners of all security categories, with special needs and various characteristics. These include prisons like the federal transfer center, the federal detention centers, federal medical canters, and federal prison camps. They also include metropolitan correctional canter and metropolitan detention center.