The Gira System 106 is intelligently designed in every detail, so that it is very simple and secure for the fitter to install. The housing should be mounted separately on the wall. Then, the different modules are initially inserted into a function support frame and this is then snapped into place in the housing. A particularly useful feature: a safety cord, which prevents the modules accidentally falling out during installation. The housing can finally be screwed shut and made theft-proof with a patented bit holder and the special bit.