"BigWallop" wrote in message
om...


Those screws are "Self Tappers" because they come to a sharp point and
will
cut their own hole. Where do the instructions say they should be used?
Does the three gang socket have holes at the ends to fix them back to the
wall? Does the converta have a knock out on the back to fix it to the
existing back box? Doe the converta come with its own back box for
surface
mounting onto an existing sunken back box?

Or, in other words, tell us more about this "Converta" thing you've bought



The four way ones are surface mount.
The connection is to the ring main wires into normal screw terminals.
It screws to the existing back box either single or double.
The actual terminals stick out the back and go into the back box.