Kalhberg is an ideal fence post especially for construction markets since it is a secure product against interventions and, also easy to install. Prevents the wire from being dismantled from outside since there is no connection, assembly, clipping, screwing and fitting parts on the exterior surface. Fast and easy to install thanks to its unique design. Panels mounted to the posts from inside eliminates any difficulties in respect of installation and occupational safety risks in case of application on sites with higher frontages. Possible to angle and slope the panels during the installation on slopping lands thanks to the flaps on the front face of the posts. Possible to install on any type of graded walls and lands considering the different elevations and grades without the need for any discharging and forms on the post flaps. Posts with flaps and channels, fixed on apparatus or ability to install subsequently, possible to install the system with a single apparatus, need for extra posts and accessories in case of slopping, graded lands.