and high load: these fixers are made of plastic and nails are made of iron. Can be nailed into wooden walls, gypsum walls and plaster walls. Easy installation: place the hook close to the wall, and then gently knock four nails into the wall one by one with a hammer. No need to drill holes, only one hammer is needed for the whole installation. and traceless: Compared with ordinary hanging picture hooks, these hanging picture hooks leave only four small pinholes after being removed, which are almost . Minimize damage to the wall. Applicable walls: widely used in most walls, such as plaster walls, gypsum walls, wallpaper walls, wooden walls and concrete walls. Very suitable for hanging pictures, p os, clocks, paintings, mirrors, clothes, bags and so on. Tip:These picture hooks may not be suitable for some particularly hard concrete walls and stone walls. Colour:White Material:Plastic Package Contents: 30 * No trace hook Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.