What is the difference between self drilling screws and regular screws?

Self-drilling screws are different from regular screws in that they have a drill bit built into the tip of the screw, which allows them to create their own pilot hole as they are inserted into the material. This eliminates the need for a separate drill bit or pilot hole and can save time during construction or assembly.

Regular screws, on the other hand, do not have a drill bit built into the tip and require a pilot hole to be drilled before they can be inserted into the material. The size of the pilot hole will depend on the size of the screw and the type of material being used.

Self-drilling screws are commonly used in construction and manufacturing where they can be used to join two pieces of material together without the need for drilling a pilot hole first. They are commonly used in the construction of metal studs, drywall, and roofing panels, as well as in the assembly of electronics, cabinetry, and machinery.

In general, self-drilling screws can be a more efficient and convenient option than regular screws, especially when working with harder or thicker materials.