Industrial style hooks

Lot of three hooks in metal, unusual, we don't come across not every day. Cast iron? Steel? In any case, they are rather heavy when held in hand. The visible part is covered with an orange coating, looks like the oven, but it is more "hot" to the touch, so rather a material plastic? They are slightly different from each other at the level of the shape of the base. However, they all have a slightly dull orange color which makes them look vintage industrial, accentuated by the simplicity of their forms, no frills. They are strong but have traces of their age, the patina of time: spots more or less dark, surface rust on the back of the bases. On two of the hooks, the coating has a crack: on the one hand, it's at the top of the "hook" the longest (we never see so more when the peg is fixed to the wall). The other is inconspicuous, it is located on the base at the level of the hole for the screw at the bottom on the left. The screw is not present. The base of these hooks is 4.5 cm on about 7 cm. The peg "advance" 12 cm approximately (once determined, between the wall and the tip of the hook). They weigh about 180 g each.

Ref. : ZAP1QQZ