AB-06Drill pilot holes and fit the right fixingFor a timber fence post, rail or shed stud, drill a pilot hole slightly narrower than your screw into the centre of the timber, then drive a stainless steel wood screw home — stainless resists rust outdoors, unlike standard bright screws. For a steel-framed shed, never use a wood screw or a plastic wall plug, as both strip straight through 0.5mm steel; use a self-drilling metal-stud screw instead, driven directly into the frame at a slow, steady speed. If your only solid fixing point is thin cladding with no batten or stud behind it, stop and fit a timber batten across two studs first, rather than relying on the cladding alone.