The concealed fitting mechanism is superb. It is a specially formulated aluminium profile that attaches the back panel to the wall. A precise 3.5mm gap is left up and down the complete length of the back panel in order for the furniture to be attached. Because the profile is attached to the back panel and then to the wall, it is the wall that takes the weight of the modules etc. This makes the whole system very solid and rigid.

Here you can see a shelf with side bracket. This is attached to the concealed mechanism in this case between the back panel and wooden end profile. The fit is always perfect. You will notice the holes that enable you to adjust the shelf or drawers up and down to suit you.