Body Size: 3-3/8" Wide X 1-1/2" TallChain Size: 7-1/2"Material: SteelFinish: Brass PlatedProvides Added Security On Residential And Apartment DoorsCan Be Easily Installed On Either Wood Or Metal Doors For Installation FlexibilityUsed To Allow A User To Identify Visitors From The Security Of A Locked DoorComes With Screws