1.5 mm-thick steel sheet wall-mounted distribution units with a 482.6 mm (19") mounting bezel whose depth may be continuously adjusted, mounted on C rails. These units are ideal for small networks or to serve as a stage splitter. Logical and orderly input and output cable fitting using the cable feed plate. Metal sheet door features one or two locks with double-bit locking devices. The unit features a C rail for retaining the cables installed in the unit.