Not only against children of this 3-way connector is secured, but also to adults: simply unusable because some plug a few are not and einzustecker only with great difficulty. Not to mention the withdrawal. After I scarred my fingers bled, both ordered connectors are migrated to the ton. It's not worth the trouble for complaint.
I buy these things soon returned to Holland in the market. Since it is at least honest China garbage without fictitious CE mark.