They permit 180° of free-swinging motion and work with formed sheet-metal doors. Most of the fixed-installation-style (EH Class) hinges can accommodate doors and frames that are on the same plane.
Dear James: In my house, which is rather old, the door hinges are stiff, and the cabinets don't close well. I need to install new ones. What are the best hinges for the various applications? — Tammy H ...