4 Pics 1 Word Level 530

Answer:
Hinge
Hint
What is the answer to the 4 Pics 1 Word level with A person clutching their knee, A metal device used for opening and closing doors, An X-ray of an elbow marked in red, and The corner metal piece to a door?

Hint
What is the answer to the 4 Pics 1 Word level with A person clutching their knee, A metal device used for opening and closing doors, An X-ray of an elbow marked in red, and The corner metal piece to a door?