Concealed or Invisible Hinges as the name suggest,
are those hinges that cannot be seen and allow you to see only the
surface of the door. Sometimes referred as "European-style"
hinges they offer a clean design look. For the full sized doors they are
suitable. Invisible hinges are easy to install and have capability to
compensate for slight imperfections in door construction. Another
advantage of the concealed hinge is that it has the ability to take a
door on or off without removing the hardware.

They
can be used for main doors as well as cabinet doors. They consist of two
parts:
- The hinge cup and the arm
- The mounting plate
Features
Following are the features of invisible or concealed hinges:
- Applicable for doors of full size where a hidden door application
is desired.
- Invisible or concealed hinges come screws and other hardware
needed for installation.
- They have fine jointing to eliminate sagging and gapping.
- They are strong safe and secure.
- Since they cannot be seen they cannot be tampered.
- Hinges are made of high strength and heavy duty metals.
- Invisible hinges can be installed easily with the help of power
drill and drill bit or with a router.
Finishes on Invisible Hinges
Various materials like steel, brass, bronze, polished brass, wrought
iron etc., are used for making concealed or invisible hinges. They are
given finishing touch by coating with materials like:
- Chrome Plated
- Nickel Plated
- Brass Plated
- Satin Brass Coated