Self Drilling Screws gathers drilling, tapping and tightening at the same time.
The reason is self drilling screw has an extra function–drilling.
These Drill points are designed in a manner much the same as a high speed drill bit.
Self drilling screw’s case hardness and core hardness is higher than the self tapping screw. Self-drilling screws have a hardened drill point that will drill and thread in structural steel and mild steel. Self-drilling screws are available in a variety of finishes with unique product features to suit a wide range of environmental conditions.