Metal speed plugs, also known as metal drywall anchors, are light-duty fasteners designed for securing items to plasterboard or drywall. Here are some key points about them:

Structure: They typically feature a metal body with a cross-recess head for easy installation using a screwdriver.

Function: These plugs are designed to expand and grip the drywall when a screw is inserted, providing a secure hold.

Applications: Ideal for hanging lightweight items such as picture frames, mirrors, and small shelves on plasterboard walls.

Installation: The installation process involves:
Drilling a pilot hole in the drywall.
Inserting the metal speed plug.
Driving the screw into the plug, which causes it to expand and anchor securely.

Advantages: They offer a quick and easy solution for light-duty applications and can be installed with basic tools.