Features 1、SPECIFICATIONS: Including 250pcs self drilling screws, with M4.2x16mm specification, sufficient in quantity, easy to use and replace. 2、CLEAR THREAD: These screws have a standard and clear thread for excellent retention, can easily fix the material to the metal board. 3、CARBON STEEL: Made of excellent carbon steel material, has high hardness, wear and corrosion resistance, with 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 tough 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: Drill Screw Material: Carbon Steel Surface Treatment: Galvanized Specification: M4.2x16mm Package List 250 x Drill Screws