Suitable for hanging art decorations of home, classroom and workplace such as clock, blackboard, photo frame, photo wall, small mirror, clothes, keys, umbrellas, metope adornment, bags, office pendantsand so on. Suitable for avariety surfaces: brick wall, concrete wall, cement walls, stickers wall, lime wall, whitewashed walls, wood, wooden doors, wallpaper walls. No damage to the wall:160 pieces non-trace picture hangers. The biggest characteristic of each hook is that it will not leave any marks on the wall, maintain the integrity of the wall, help to protect the wall from damage. Easy installation: Use a small hammer to nail the steel nails right into the selected position of the wall gently and no trace will be left. Easy for hanging large and heavy objects like photos, paintings or other hanging ornaments. Colour: white Material: Plastic + Steel Size: Extra large: 2 x 5cm Large size: 2 x 4cm Medium: 1.5 x 3cm Small: 1.5 x 2.5cm X card slot: 4 x 4cm Package Contents: 80 x small hanging hooks 32 x medium frame hooks 16 x large photo hooks 16 x extra-large picture hanging hooks 16 x multi-function frame support hook