The Stanley Hardware 3-1/2-by-3-1/2-inch standard weight spring hinge automatically closes the door and is ideal for use in corridors, entrances and stairways. An alternative to overhead mounted door closers, this spring hinge looks and performs like a premium concealed bearing hinge and is well suited for residential work. Anti-friction bearings take vertical and lateral loads; the patented ratchet design allows for quick fine-tuning of tension with just an Allen hex key. The hinge can be installed right- or left-handed, can be used with doors measuring up to four by eight feet and weighing up to 180 pounds, and comes complete with a wrench, adjusting pins, and directions. Backed by a lifetime warranty against defects in material and workmanship, this product features square corners, measures 3-1/2-by-3-1/2 inches, and comes in a bright satin brass finish.