Superior Material & Large Size: These picture hangers are made of superior ABS Plastic, which is much more sturdy than common PP Plastic. Size of each one is 1.65*0.79 inch, hold up to 25 LBS,Invisible&Traceless:Compared with ordinary nails, the nails of these stucco hooks only leave very small pinholes that you could barely noticeable, preventing your walls from damage,Applicable Walls: It is widely suitable for most walls like concrete/cement wall, stucco/plaster wall, wall paper/wooden wall. These hooks are very sturdy and heavy duty, can be used for a long time,Enough Quantities for Wide Use: It includes 40 pack wall hooks. These can be used for hanging picture, tapestry, mirror and more. Great value package!,Easy to Install: All you need is a hammer and no drilling needed. It is very easy to install. Saving your time and enjoying your beautiful home decorations