What kind of metal is the ordinary key made of?
According to the unearthed cultural relics and the written records, the ancient lock works on the elastic force of two plate like springs. Until now, this spring was still in use.
There are many kinds of keys, such as ordinary key, intelligent key, remote control key, electronic key and so on.It is said that Luban was the first man to lock the office up.
The common key materials are copper, aluminum and other metals.
