The screw hooks are made of white carbon steel with vinyl coating on the surface, smooth and rust-proof, protecting whatever you hang The spiral hooks are perfect for hanging gifts Christmas, mugs, napkins, plants, potted plants, lamps, curtains, holiday decorations and more. EASY TO INSTALL - With deep threads and screws in sharper steel, you can screw metal screw hooks into wood, walls, roofs or plaster Versatility: Ceiling hooks are perfect for safely hanging lights, cups, keys and other lightweight items. Contents - 1/2'' White * 30 screw hooks/screw hooks/ceiling hooks Note: Data is all measured manually, please allow 1-3cm error due to differences in light and display, there may be color differences, please refer to the actual item received.