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On taller doors, H hinges were occasionally used between them. HL hinge Commonly used for passage doors, room doors, and closet doors in the 17th, 18th, and even 19th centuries. Small H hinges (3–4 in or 76–102 mm) tend to be used for cabinets, while larger ones (6–7 in or 150–180 mm) are for passage doors and closet doors. H hinge These H-shaped barrel hinges are used on flush-mounted doors. They are made in right- and left-hand configurations. This allows the hinged objects to be easily removed (such as removable doors). Flag hinge A simple two-part hinge, where a single leaf, attached to a pin, is inserted into a leaf with a hole. They are manufactured with or without holes. Continuous / Piano hinge This variety of barrel hinge runs the entire length of a door, panel, box, etc. Most concealed hinges offer the advantage of full in situ adjustability for standoff distance from the cabinet face, as well as pitch and roll by means of two screws on each hinge. They are also called "cup hinges", or "Euro hinges", as they were developed in Europe and use metric installation standards. Butterfly / Parliament (UK) hinge A decorative variety of barrel hinge with leaves somewhat resembling the wings of a butterfly Case hinge Similar to butt hinges, but usually more decorative most commonly used in suitcases, briefcases, and the like Concealed hinge Used for furniture doors (with or without a self-closing features and/or damping systems),they consist of two parts: (1.) the cup and arm, and (2.) the mounting plate. Most mortise hinges are also barrel hinges because of how they pivot (i.e., a pair of leaves secured to each other by knuckles through which runs a pin). A hinge can also be made as a half-mortise, where only one half us mortised and the other is not. Butt hinge / Mortise hinge Any hinge designed to be set into a door frame and/or door is considered a butt hinge or mortise hinge. The vast majority of hinges operate on the barrel principle. Basic hinge Barrel hinge A barrel hinge consists of a sectional barrel (the knuckle) secured by a pivot.
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