Hinge Hinge Dr. Martens Category="Door furniture"Category="Hardware (mechanical)"A hinge is a mechanical device that connects two solid objects, allowing Rotation between them. Hinges may be made of flexible material or of moving components. In Biology, many joints function as hinges.

There are three main types of door hinges:

Butt/Mortise Hinges, usually in threes, which are inset into the door and frame
Continuous Hinges, which run the entire length of the door (also known as a "Piano Hinge")
Pivot Hinges which pivot in openings in the floor and the top of the door frame

External links

Hardware Source Hinge Information including a Hinge Glossary