Glossary of Terms
IC Core (Interchangeable Core)
A compact keying mechanism in a specific "small format" figure-eight shape.
Inactive Door (or Leaf)
In a pair of doors, the leaf that generally does not move may be secured by flush bolts.
A device used in connection with a hotel lock to indicate whether or not the room is occupied.
A hinge so constructed that no parts are exposed when the door is closed.