4 in. x 4 in. Brushed Chrome Steel Spring Hinge with 5/8 in. Radius (Set of 3), Global Door Controls, Mfr#: CPS4040-5/8-26D-3

The Global Door Controls 4 in. x 4 in. brushed chrome residential steel hinges functions as a full mortise single acting spring hinges. Recommended for use where automatic self-closing of a door is required. This 3 knuckled hinges is adjustable and the spring tension can be increased or decreased by using included adjusting tool. For maximum versatility use 3 hinges on required opening. Full spring tension may not be required on all hinges but allows for greater adjustment.