"Material: High Quality ABS Plastic Steel Nails. Packing: PVC Box Mixed C-Series Non-Marking Nails Extra Large Wall Studs: 4Large wall studs: 10pcs x Card Slot Wall Nails: 4pcs Small wall studs: 16 piecesMedium Wall Studs: 6Box size: 175mm*100mm*23mm Hanging photo frame: No - trace for hanging is easy to use. Just use a small hammer to drive the nail into the nail without leaving obvious marks on the wall. It is especially suitable for moving into a new home with dozens of hanging pictures and artworks. Hanging Picture Frame: No - trace for hanging is easy to use. Just use a small hammer to drive the nail into the nail without leaving obvious marks on the wall. It is especially suitable for moving into a new home with dozens of hanging pictures and artwork. Easy to Install Just place one side of the nail hooks on the concrete wall, and gently drive in the four nails steel into the wall at constant speed until the end of the nail is flush with the top of the wall. hung.Picture hooks are suitable for artistic decoration in homes, classrooms and workplaces, such as picture frames, picture walls, small mirrors, clothes. Note: The data is all Manually measured, please allow 1-3cm error, due to the light and display difference, there will be some color difference, the actual object received shall prevail.