High quality non-trace hanger with durable super fine nails Non-trace hanger with durable super fine nails. Good solution for hanging small to medium size frame or utility with minimal damage to walls. Hangers are hidden under the frame, more durable than adhesive hook. Product Name: 20 Pcs Non-Mark Hook Material: Good quality plastic & Metal nail Color: White Size: 1.2 x 0.6 inches (L x W), the nail 0.59 inch length Traceless hooks carrying limits: theoretical load 12lbs max Non trace wall hooks can be used on a variety surfaces, work best on brick wall, cement walls, stickers wall, lime wall, whitewashed walls, wood, wooden doors, wallpaper walls. But not suitable for stud walls. Non trace wall hooks are suitable for hanging keys, photo frame, clock, small mirror or utility at home, classroom, workplace and shop. Best for hanging small to medium size frame, art painting, wedding photos... Install Instructions: 1.First mark the location you need to fix on the wall. 2.Place the non trace nails in the marked position. 3.Gently knock the invisible nail into the wall with a hammer. 4.Gently push the traceless nail hooks by hand to confirm that it is firm. 5.You can hang up what you want to hang. Notice: The nails are sharp that please use them carefully in order to avoid accidentally injury fingers. Be careful not to knock yourself when you knock the invisible nail. Keep the hooks away from children. Package Included: 20 x non trace hooks 1 x plastic storage box