Michael Chare wrote:

Do concrete screws grip properly when inserted into breeze block

My house has 60's breeze blocks (that take quite a bit of chiselling
when you need to chase into them, unlike the modern lightweight blocks
you can scratch with a fingernail).

When altering a stud partition wall, I used some 6" concrete screws at
the stud/block junction ... no problems, the bottom plate of the wall
was also screwed down into the concrete floor with the same screws; but
the top plate was screwed up into the first floor joists, so not
entirely dependant on the concrete screws into blocks.