What is a Knife Hinge?

A knife hinge is a type of hinge that is often used for inset cabinet doors. It gets its name from the fact that the two hinge plates are joined together with a long, narrow “knife” that fits into a groove or mortise in the edge of the door and the cabinet frame. The hinge plates are typically surface-mounted on the inside of the cabinet frame and the door, creating a neat, flush appearance on the outside.

Knife hinges are a popular choice for cabinet doors because they allow for a clean, streamlined look without the need for visible hinges or hardware. They are also relatively easy to install and adjust, making them a convenient option for cabinetmakers and DIY enthusiasts. However, knife hinges may not be as durable as other types of hinges, and they may require more maintenance and adjustment over time.