These nails are used for roofing.
Anchor is placed through the object and into the wall where after the nail is driven in all the way to enable expansion of the sleeve inside the hole.
The object is then fastened by driving a screw into the drywall plug. Drywall ... Plastic drywall plug can't drill into areas where there is a metal or wooden stud.
SCR Ceiling 4.2 X 40mm The Screw and Wall-plug fixing pack is to be used in conjunction with the Screws and Wall Plugs
B519 Blind Rivet stainless steel open can be used for thin sheet metal work