BB-04Choose the right fixing for your wall typeFor a timber stud wall, fix directly into the centre of each stud with heavy-duty wood screws or coach screws, going in at least 40mm. If you actually have metal studs, a plain wood screw will strip straight through 0.5mm steel: use a self-drilling metal-stud fixing or a hollow-wall toggle rated for the wall, but know that a fold-down bar pulls away from the wall in use, so metal studs alone won't hold it long term. Fit a timber noggin between the studs first and fix into that instead. On solid brick or block, drill with a 10mm masonry bit to at least 50mm depth and use a matching plug with a coach screw. On dot-and-dab plasterboard, your fixing must cross the air gap behind the board, typically 30-50mm, and still get 40mm or more into the masonry, so use a longer fixing or a frame fixing sold for dot-and-dab. On lath and plaster, screws into laths alone won't hold: find the timber upright behind the laths the same way as a stud, and fix into that, expecting the surrounding plaster to be fragile.