HD-06Fit the right fixing for your wall typeIn solid brick or block, drill an 8mm hole to the depth of the plug, insert a matching wall plug, and drive in a screw sized for it. Into a timber stud, skip the plug and drive a wood screw straight into the centre of the stud. Into a metal stud, use a self-drilling metal-stud fixing or a toggle-type hollow-wall anchor - never a plain plastic plug or an ordinary wood screw, which strips straight through 0.5mm steel. Fixing into plasterboard between studs, or into dot-and-dab plasterboard, needs a toggle or hollow-wall anchor rated for the weight, and for dot-and-dab it must be long enough to also reach the masonry behind; into lath and plaster, aim the fixing into a lath timber where possible, or use a spring toggle if you land between laths. A metal stud alone will not hold anything heavy, or anything that pulls away from the wall in use, such as a TV arm or a wall-hung basin - that needs a timber noggin or pattress fitted between the studs, or a fixing through to the masonry behind.