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