High Quality Pair of Stainless Steel Plated 4 x 4 inches with 1/4 in radius. Adjustable Spring Hinges Oil Rubbed Bronze. 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.