SURFACE MOUNTED ADJUSTABLE HINGES LEFT OR RIGHT HAND Designed with the same internal features and capacities as the SERIES W, the SERIES K provide special hinge pin offsets which allow the door's cover plate to overlap the door frame. This security feature is often employed in vault type doors. Can also be designed for swing clear applications. Concealing the mounting hardware after installation, can further enhance the contemporary appearance of the SERIES K. Please call for detail drawings.