[Details of screw set] M3 bolt, M3 nut, M3 washer, M4 bolt, M4 nut, M4 washer. Bolt length: 8mm / 12mm / 14mm / 16mm / 20mm. It is a set of 480 screw bolts in total.

Flat head screw with cross hole Material] High quality color galvanized surface. Since the surface is galvanized, it has excellent durability, corrosion resistance, and chemical resistance. Strong, sturdy and resistant to deformation.