Door Lock

The door lock plays a vital role in human life, because the door lock we are using in day-to-day life, for example, if we are going out for shopping we will lock the door, if we are going to the supermarket in the car we will use the door lock system over there also to look the door. The door lock was invented in the early 18s, before that we are using wood chips has been used to secure the door, During the olden age, most people used to trade goods using food and other things needed for humans to be sustained, because of that during that time cash and currency concept are not there.

When the currency has been used for the purchase of goods and materials, during that time we feared for the stole the currency, and because of that, the door has become a mandatory tool for humans.