These wall clips are the primary method of fixing a shelf to the wall.
This is the hardware that will attach the rear edge of the shelf to the back wall!
The general rule for getting the correct amount of wall clips is that you buy a wall clip for every foot (30.5cm /12") of shelving you have and add one for each shelf i.e. if fixing a 1.83m / 6' length of shelving you will need 7 clips.
The wall clips are sold separately and come complete with all fixing hardware. These clips will work with both stud and solid walls.