WD-09Drill and fit the anti-tip strap for your wall typeCables and pipes can run almost anywhere in a wall, not just in the usual safe zones, and a metal stud frame can confuse a cheap detector. Before you drill, find your stopcock — usually under the kitchen sink — and check it turns, so you can shut the water off fast if you hit a pipe. If you're in any doubt, isolate the circuit at the consumer unit first, and still treat every wall as if something is hiding behind it, even after checking with a detector. For solid brick or block, drill a 6mm hole to 40mm depth, fit a wall plug, and drive in the screw provided. For a timber stud, drill a pilot hole into the centre of the stud and drive a 4mm x 40mm wood screw straight in — no plug needed. For a metal stud, use a self-drilling metal-stud anchor or a spring toggle rated for the wall — never a wood screw or plastic plug, which strip straight through 0.5mm steel. For dot-and-dab, use a long fixing (at least 75mm) that passes through the board and airgap to bite into the masonry behind, such as a frame fixing. For lath and plaster, aim for a timber lath or use a plasterboard toggle that spreads the load, since old plaster is brittle and cracks under a point load. A metal-stud fixing like this holds the light pull of an anti-tip strap fine, but won't hold anything heavy or anything that pulls away from the wall in use — those need a timber noggin or a fixing through to the masonry behind.