Use the stud finder to locate a stud where you want to hang the organizer. Mark the point you have selected with a pencil.
Use the screwdriver or drill to screw in the screws over your marks. Consult your manual to see if there is a specific setup for the screws.
Hang the key and mail organizer on the screws. Use a level so that the organizer is not askew.
Test out the key and mail organizer by putting light downward pressure on the organizer.