Riddle

I turn once, what is out will not get in. I turn again, what is in will not get out.

Choose an answer

A.A Door
B.A Doorknob
C.A Steering Wheel
D.A key
Hint: It's a 2-word phrase with 4 letters, starting with "A".

Answer

A key

Why this is the answer

Turning a key locks or unlocks a door, controlling entry and exit.

This riddle is filed under Riddles for Adults and rated Hard.