SR-05Drill and fit the right fixing for your wallFor solid brick or block, drill a 6mm hole 40mm deep, tap in a 6mm wall plug, and use a 6mm x 40-50mm screw. For a timber stud, skip the plug — drill a 2mm pilot hole and drive a 4mm x 40mm wood screw straight into the centre of the stud. For a metal stud, never use a plastic wall plug or an ordinary wood screw — they strip straight through 0.5mm steel; use a self-drilling metal-stud fixing on the stud itself, or a hollow-wall toggle rated for at least 5kg if you're fixing into the plasterboard between studs. For dot-and-dab, measure the gap behind the board with a bradawl or long thin drill bit, then use a long fixing (60-75mm) that passes through the board and the adhesive void into the masonry, with a plug rated for that depth. For lath and plaster, use a fixing made for the job or find the timber lath or joist behind; the plaster is brittle, so drill slowly without hammer action to avoid cracking it.