RT-04Choose the right fixing for your wallIf you found a timber upright or batten, mark its centre, drill a 2-3mm pilot hole, and drive a 40-50mm wood screw straight into the timber — this is the strongest fixing for lath and plaster and avoids stressing the brittle plaster. If there's no timber where you need to fix, use a spring or gravity toggle rated for lath and plaster or old ceilings, not a standard plasterboard fixing, and only for something as light as a router. On solid brick or block, drill 6mm and use a wall plug with a matching screw, 40-50mm deep. On dot-and-dab plasterboard, use a fixing long enough (usually 60-75mm) to pass through the board and dab gap and bite into the masonry behind — a normal wall plug won't reach. On plasterboard over TIMBER studs, screw straight into the centre of the stud. On plasterboard over METAL studs, use a self-drilling metal-stud fixing or toggle made for steel — never a plastic wall plug or ordinary wood screw, which strips straight through 0.5mm steel and won't hold, especially with a stiff cable pulling on it.