DIN Rail supports are used for housing of high connection density contact carriers or inserts within control cabinets panels. No tools are needed for installing these products. The inserts contact carriers can be snapped into the DIN Rail supports with hands. Also the DIN Rail supports can be snapped on to the DIN Rails without tools. These DIN Rail supports are fully cross compatible with inserts of other makes. The inserts and hence the contacts are fully secured by locking the male inserts with the female inserts. This is achieved by using locking levers.