4% self-drilling screws are specifically designed to drill through harder materials such as steel and concrete. These screws have a special drill bit on the tip that allows them to penetrate the surface easily without the need for a separate drilling process. This feature is especially useful in applications where time is of the essence, as it speeds up the installation process significantly.

1. Metal Roofing Their self-drilling nature makes them ideal for attaching metal roofing panels to structures quickly and securely. They ensure a tight seal, which is critical for preventing leaks.