Easy to install, just place the side of the picture hook tip on the concrete wall and gently hammer the steel nails into the wall Ideal use for hanging photos, paintings, clothes, bags, etc. These plastic hardwall hangers only have small pinholes on the walls, so it can damage minimal damage to the wall Widely use: perfect for home, office, dorm, apartment. especially perfect for move into a new home and have dozens of photos and artwork to hang These non-trace picture hooks are made of high quality materials, durable and lightweight, the maximum load weight is 5 kg