The grid consists of three thin aluminum struts, which are clipped on both sides in two plastic holders. These brackets are secured with three small cog. The angle below which are then placed under the mattress, are simply plugged.
If you set the bed rail then as provided under the mattress, already arises the first problem: The grid is not in Lot (is not perpendicular to the mattress, but tilts slightly to the outside), which is not surprising, after all go the slats slatted base up slightly toward the middle, and on the bed rail is nunmal.
The design itself is very shaky and not trustworthy. I do not think that it can provide long-term reliable that our three year-old son does not fall out of bed. We have the bed rail immediately dismantled and returned therefore again. It is good for nothing.