It’s Key features are:-
1.Head Types: Frequently paired with Hex Washer heads for high-torque socket driving, or Pan/Button/Torx heads depending on the specific applications
2.Point Styles: Available either as a standard sharp/notch self-tapping point (requiring a small pilot hole) or a self-drilling TEK point variant that drills its own hole during installation
3.Thread Design: Features sharp, coarse external threads engineered to cut or form threads into the host material without needing a pre-tapped hole
4.Sealing (Optional): Many M5.5*38mm variants used in roofing or cladding include a bonded EPDM rubber washer to provide a watertight seal against moisture