A key is a small metal object that can open doors, lock or unlock things, or fit into the ignition of your car. It can also be used as a weapon — but we don’t recommend that. A key is made up of two parts: the head and the shaft. The shaft is what you grasp when you turn it in the lock; it’s usually made from metal or plastic. The head is where the teeth are located; this part of the key is often made from brass or steel.

The weight of a key varies depending on its size and shape, but most keys weigh between 0.5 and 5 ounces (15-150 grams). The standard door lock requires about 3 turns to completely unlock — meaning that 3 turns equal 1 ounce (30 grams).

If you have more than one key for your house, car or office building then it’s important to keep track of them all so they don’t get lost! You can make your own key ring using a paper clip or ribbon and attach it to your pants pocket with a safety pin so that every time you put on pants you’ll see them right away!

Last modified: October 28, 2022