Assembly Line

What are screws made of?

Screws take steel wire and zinc directly. Trace them back and you pass 15 made things on the way to 13 raw materials.

How screws are made What is made from it See it on the map

What goes straight in

From the ground: 13 raw materials

Made along the way: 13 things

Metals 6

Chemicals and fuels 6

Electronics 1