Rather than buying 10 of them when I only needed one I've decided to modelize and share with you this little shelf bracket used in my swedish designed cupboard.

You must screw the "toothed" part in the cupboard wall in a hole (4.5 mm diameter and 7mm max deep) and place a shelf on the "non toothed" part after having made a whole (4.5 mm diameter and 7mm max deep also).

Hope this will help some of you !