RB-05Fix the brackets for your wall typeSolid brick or block: drill with a 6mm masonry bit to 40mm depth, fit a red plastic wall plug, and use a 35-40mm No.8 screw. Plasterboard on timber studs: drill a small pilot hole and drive a 40mm wood screw straight into the centre of the stud, no plug needed. Plasterboard on metal studs: never use a wood screw or plastic plug, they strip or spin straight through 0.5mm steel — use a self-drilling metal-stud fixing or a wing-toggle rated for hollow walls, following the pack's load rating. Dot-and-dab plasterboard: use a long fixing, 55-75mm, that passes through the dab and bites into the solid masonry behind, or a hollow-wall toggle if you can't reach masonry. Lath and plaster: the lath is fragile and won't hold a screw alone, so find the timber stud behind it with a pilot hole test and fix into that, or fit a small timber noggin first if the brackets fall between studs.