Hi,
It won't accept a Schuko plug as the plastic projections at the top & bottom are too narrow to allow the plug to enter (I've tried!) I imagine there's an earthed version for a few rand more.
We have an adapter here in France that allows unearthed 16amp plugs (on power drills, vacuum cleaners, etc.) to be used in 6amp two pin sockets. They too have the plastic detents, but some folk cut them out to allow Schuko plugs to fit. Now that IS dangerous!
Cheers, Pete