GW-04Drill and fix into a timber or metal studBefore you drill, remember cables and pipes can run almost anywhere — a detector helps but can miss cables that are deep, in conduit, or behind metal-backed board, and metal stud frames confuse cheap detectors further. Find your stopcock, usually under the kitchen sink, and check it turns; if in any doubt, isolate the circuit at the consumer unit before drilling. For a timber stud, drill a 2mm pilot hole into the centre of the stud and drive a 40mm wood screw or picture hook straight in, no plug needed. For a metal stud, never use a plastic wall plug or a plain wood screw, which strips straight through 0.5mm steel — use a self-drilling metal-stud anchor or a toggle-type hollow-wall fixing rated for at least double the frame's weight, and if a frame is heavy or likely to be knocked, fit a timber noggin between the studs first, since a metal stud alone won't hold weight that pulls away from the wall.