Self closing, semi-concealed, variable overlay hinge, in Satin Nickel. The center-to-center screwhole dimension for the hinge wing that mounts on the face frame is 2-1/8".Steel base material, 1.5 mm, about 1/16th of an inch thick. Matching color screws are included. Same high quality hinges as well known brands.Important Note: These are overlay hinges not inset hinges. There is a big difference so please know what you are buying. Overlay means your cabinet door "overlays" (or overlaps) the cabinet frame and thus the door is perfectly flat on both front and back. A type of overlay is a Variable Overlay, these only come in a face mount. These are called Variable Overlay because your door does not have to overlap your frame by a set dimension (such as 1/2in. or so).