SH-05Drill and fix the brackets for your wall typeOn solid brick or block, drill with a 6mm masonry bit to at least 50mm depth, fit a wall plug, then use a 50mm screw. On dot-and-dab, drill through the 12.5mm plasterboard and the dab gap into the masonry behind, then use a long fixing (75-90mm) with a matching plug so it grips the solid wall, not just the board. On timber stud, drill a 3mm pilot hole into the centre of the stud and use a 4x40mm wood screw. On metal stud, never use a plastic wall plug or an ordinary wood screw, as it will strip straight through 0.5mm steel; use a self-drilling metal-stud screw for light loads or a toggle-type hollow-wall anchor for anything with more pull, and if the shelf will carry real weight or anything that tugs at the wall, fit a timber noggin between the studs first or fix through to the masonry behind instead. On lath and plaster, fix through the lath into the timber stud or masonry behind it rather than into the lath alone, as it can crumble under load.