This upholstery tack is made of high-quality iron, the surface is smooth, exquisite, durable, sturdy and burr-free Requires proper tools like needle nose pliers and light weight tack hammers to install them You can use this tack as decorations on sofa, beds, wood crafts, walls, jewelry box, etc. Use this to fix maps, photos and other lightweight stuffs, it has more function than you expected Plastic-coated finish for higher-resistance against rust and corrosion in any type of condition