Phil L wrote:

Andy Burns wrote:

Maybe you're then supposed to screw some handles or hooks or something
into the threaded holes?

Maybe, but in 25 years of installing these things I've never seen one like
that.

Normally, there's a black plastic strip, which is prised off with a flat
driver and underneath is a lift handle that pulls up, there's one on each
side.

Indeed mine is like that, but neighbour's is more like the O/P's, we
needed a heavy duty pair of threaded manhole keys and two car jacks to
shift it.