This shelf has been specifically designed to be compatible with the IKEA Skadis pegboard. The shelf requires assembly. The insert with the hooks has the same dimensions as the cutout, so it fits snugly and is held in place reliably. If you want to play it safe, you can add some glue. Before assembly, make sure to clean the cutout from any sagged bridges and leftover support material.
I am constantly developing more IKEA Skadis attachments. Check out my