250pcs M4.2x16mm Carbon Steel Drill Screws Zinc Plated Self Drilling Screw Replacement Feature:1. Specifications: including 250pcs self-drilling screws, with M4.2x16mm specification, sufficient quantity, easy to use and replace.2. Clear Thread: These screws have standard and transparent thread for excellent retention, you can easily attach the material to the metal plate.3. Carbon steel: made of excellent carbon steel material, it has high hardness, wear resistance and corrosion resistance, with a long service life.4. Good stability: These drill screws can be used with screw guns, with high stability, very suitable for wood, metal and other difficult materials.5. Galvanized surface: the surface of these self drilling screws is galvanized for good corrosion resistance and can be used in harsh environments. Specification:Item Type: Screw Material: Carbon Steel Surface Treatment: GalvanizedSpecification: M4.2x16mm Packing List:250 x Drill ScrewNote:Pay attention to the correct operation