Includes 35 invisible non-marking spikes, each measuring 1.57x0.78inch. Load weight 17.6 lbs. This invisible hanging nail is made of high strength stainless steel nails, very easy to install, hammer in 4 small steel nails to complete the installation, no drilling, no damage to the wall. Can be freely combined without damage wall hanging, hanging different items for decoration, suitable for hanging pictures, photos, clocks, paintings, small mirrors, artwork, keys, clothes, umbrellas, bags and so on. Hooks can be used on dry concrete walls, stucco walls, cinder block walls, cement walls, etc., perfect for homes, classrooms, and workplaces. Tip: Not recommended for brick walls or other dense walls. Specification. Name: invisible non-marking hooks Colour: White Material: plastic and metal Function: can be used as photo frame hangers, mirror hangers, decorative items hangers, key chains, bags, hats, artwork. Suitable for flat, dormitory, garage, garden, patio wall art decoration. Product size: 1.57x0.78inch/4x2cm Package quantity: 35pcs non-marking hooks