The drilling nobody sees determines everything else
The KEIL concealed fixing system makes it possible to create clean, elegant façades free from visible fixings. However, the success of the system does not depend on what can be seen from the outside, but on what happens on the rear face of each panel: the KEIL undercut drilling.
Even a minimal deviation in depth, diameter or positioning can compromise the correct operation of the fixing and cause problems during installation.
By the time an error is detected on site, the cost is already high.