What material is the key made of

The materials for making the key bai are mainly copper, zinc, aluminum, iron and other metals.

The invention of the key was later than the lock, and it appeared in ancient Egypt 4000 years ago. There are many types of keys, including ordinary keys, smart keys, remote keys, electronic keys, and so on.

The key is people's daily necessities. Over time, the daily necessities of the past have become collectibles. It can be roughly divided into the following categories: ring keys, honeymoon keys, energy-saving keys, "locking windows" keys, golden keys, and city "golden keys".