[material]: These cushion pads are made of hand-forged wrought iron with retro bronze color, durable and sturdy, not easy to fade, can be used for a long time [Size]: Each size of round head nails is 11 x 17mm, the length of the nail part is 13.5mm (it can drill deep about 13.5mm), and the nail part is thicker, with a diameter of 1.3mm [Easy to install]: Before installing the nails, you should pick them up with pliers and then hammer them in (recommended tool: needle nose pliers and light tenon hammers) [Multipurpose Decoration]: You can apply them on doors, furniture as decorations and so on. You can also use these brass upholstery nails as decoration on sofa, bed, woodwork, cork board, wall, etc. Or you can use them to fix maps, photos and other light items Note: The data are all measured manually. Please allow an error of 1-3cm. Due to the difference between light and display, there is a certain color difference, which depends on the actual object received