Made of 304 stainless steel with electroplated finish, durable, rust-proof and corrosion-resistant.Compared with embedded hinges, spring hinges are easier and faster to install. Just use a screwdriver to install the screws and hinges on the door, the installation is very simple.Self-closing design, very suitable for cabinet doors, closet doors, locker doors, bookcases, gift boxes, etc.Specification:Material: 304 Stainless SteelFinish: ElectroplatedOpened Dimension: 25 x 19mm / 0.98" x 0.75"(L*W)Material Thickness: 1mm / 0.04"Mounting Hole Diameter: 3.5mm / 0.14"Package Content: 8pcs x Spring Loaded Hinges with Mounting Screws.