Expanding metal wall anchors, often referred to as expansion anchors or toggle bolts, are hardware devices used to secure objects to walls or ceilings. They are constructed from metal and feature a unique design that allows them to expand within the wall when screw tension is applied. This expansion locks the anchor in place, providing a strong hold that can support significant weight.

When using countersunk self-drilling screws for steel, it is important to follow the manufacturer's guidelines for proper installation. This includes selecting the correct screw size and length for the application, as well as ensuring that the drill point is sharp and in good condition. Taking these precautions will help ensure a successful and secure fastening job.