I'm fitting a pre-made frame for a set of folding doors and wondering what to fix the jambs and header with. The kit has come with direct frame fixings around 6.5x90 which would be fine going into masonry, but I'll be fixing into stud, so wondered if those are the right thing to use? I also have some Reisser cutters 5x90 - would those be better to use fix into the wood?

