The all purpose flange is used to secure (by welding) any steel surface to its fixable (2 attachment holes) flange surface.
Flanges are 100% hot dip galvanized.
Lynx Rectangular Weld-on Flange 125 x 80mm 3 holes - HDG.
Lynx Square Weld-on Flange for 50mm square section 4 holes - HDG.