... punchingUsage:connector,construction,furniture... Custom made Stamping PartMaterial:mild steel,commonly use Q235Finish:hot-dip galvanizedProcess:punchingUsage: ... ,well protected from corrusion when use outside Mild Steel Welded Part for ConstructionMaterial:Q235,Q345 ... :construction,support,well protected outsideWood Connector/BracketsMaterial:mild steelFinish:electrophoresis,black color,salt spray test ...