Our TruClose™ hinge is not just a trademark but a proprietary patented design. Unlike the single continuous piano hinge that collects dust and grease our TruClose hinges ensure that your doors close securely and stay closed. They do not require snubbers in the track or springs mortised into the door to help the doors close. Other hinges tend to let the door sit open or ajar. In total our hinge allows us to eliminate a number of components and also does not require us to mortise the edge of the door at all.