Stanley Hardware S530-779 CD2060R Spring Hinge in Satin Brass Authorized Replacement from National Hardware Stock #N184-572 Patented ratchet adjustment eliminates need for adjustment locking pin Conforms to ANSI/BHMA standard A156.17 Meets NFPA8 standard for 3 hour fire rated doors - minimum 2 spring hinges per door required Automatically closes door - an alternative to overhead mounted door closers Standard weight spring hinge automatically closes the door; ideal for use in corridors, entrances and stairways Anti-friction bearings take vertical and lateral loads; patented ratchet design for quick fine-tuning of tension Can be installed right- or left-handed on doors measuring up to 4-by-8 feet and weighing up to 180 pounds Comes complete with a wrench, adjusting pins, and directions Measures 4 by 4 inches; square corners; bright satin brass finish