Panel mount mostly used in kiosk , cabinet, inside wall with rough opening to drop the rear housing into recess area. The front bezel will be remain at outside for flat finishing.
Most cases panel mount will come with features of Touch screen, waterproof IP65/NEMA4, sunlight readable.
In order for IP65/NEMA for panel PC, the front glass with be sealed with the front bezel and the rear side of the bezel will always come with gasket for providing waterproof between the bezel and kiosk.
There are several way to mount them
Rear mount with STUD
The stud is come with front panel where you need to open holes at your kiosk for this stud to going through your cabinet. This is the best want to secure the panel mount lcd.
Rear mount with bracket.
This is easy mounting without predrill holes for stud. Vendor will provide bracket to put the LCD bezel again the kiosk using the bracket.
Before buying the Panel mount LCD ensure the the panel mount LCD bezel is larger than your rough opening, most vendor will provide you the cut out like this.
Secondly, you need to ensure the rear housing (Recess part) is smaller than your opening In order to drop this panel PC from the front.