High Quality Pair of Solid Steel Hinges with a Satin Nickel Finish. Hard to find 4 x 4 inches with 1/4 in radius timely hole pattern. Adjustable Spring Hinges Satin Nickel. Includes matching screws, 4 hole zig-zag pattern, gauge .106" (2.7 MM). Typical use: 1 5/8" - 1 3/4" thick doors. Also known as self-closing hinges or door closing hinges.