[Lee Stewart]

Door locks: The very first locks were technically knots made from ropes. Eventually people created locks made from wood and metal. The first types were documented in ancient Egypt some 6,000 years ago. A pin tumbler lock, made from wood, was attached to the door. A horizontal bolt, which could be opened with pins, slid into the post. The key was large, also made from wood, and looked like a toothbrush.