Fixing a locker to the wall
A loaded 177 cm column with a door open can tip over if it is not fixed. That is why it should be fixed to the wall with screws and plugs, which are not included. The right plugs depend on your wall (brick, concrete, plasterboard): use suitable ones and fix the locker before handing out keys.
In schools and gyms, with children around and people in a hurry, fixing it comes first, and the same goes for a locker at home if there are children nearby.