Self-Drilling Screws With Truss Head:High-Quality Steel With Zinc Or Galvanized Coatingself-Drilling Thread For Easy Screwing Into Various Materialssharp Point For Easy Penetrationself-Drilling Thread: Allows For Easy Screwing Into Various Materials Without Pre-Drilling.Provides A Large Bearing Surface For Added Strength And Stability.Facilitates Easy Penetration Into Materials.Made From High-Quality Steel For Long-Lasting Performance.