Recommend Hanging Weight The hanging load capacity is mainly depends on the adhesion between this self adhesive hooks and the applied surface. The adhesive manufacture suggests the following load capacity: 20lb or 9kg On tiles, granite, quartz, marbles and all other smooth nature stones, wooden doors, cabinets, glasses, painted plywood, plastic, acrylic 15lb or 6.8kg On painted walls (smooth and non-stucco), mosaics, waxed surfaces. Not Recommend On stucco, wall paper, concrete wall or other uneven surfaces.