information about key
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There are many different types of keys which are used to open locks.
Keys are tools that are used in security and access of homes and cars etc.
House keys are the most common type of keys, then car keys.
Keys can be double sided or four sided, for extra security.
Thousands of years ago, wood was used to make keys.
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A key is an object used to open and close locks. Many things have locks, for example, doors. Keys are also used to turn on cars, machines and other things. A key is used by placing the key into the slot of the thing you want to unlock.
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