SP-04Choose the right fixing for your wall typeSolid brick or block: drill to 40-50mm depth with a 6-8mm masonry bit and fit a matching plastic wall plug and screw. Plasterboard on timber studs: drive a wood screw straight into the centre of the stud, or use a rated plasterboard toggle if the fixing point falls between studs. Plasterboard on metal studs: use a self-drilling metal-stud fixing or a toggle-type hollow-wall anchor, never a wood screw or plain plastic plug, which strip straight through 0.5mm steel; a metal stud alone will not hold a bracket that pulls hard on the wall, so fit a timber noggin between studs or fix through to masonry behind if needed. Dot-and-dab plasterboard, which is this job: use a long fixing, typically a 60-75mm hollow-wall toggle or screw-and-plug set, long enough to pass through the plasterboard and air gap and grip the solid masonry behind. Lath and plaster: find a timber joist or batten behind the laths with your detector and fix into that, since the lime plaster alone will crumble.