STURDY AND DURABLE- The picture hanging hooks are made of high hardness nickel-plated metal, which provides sturdy strength to support the weight. The angle of the hooks helps provide the leverage strength needed to maintain. Support heavy weight up to 15kg. . VERSATILE TO BE USED- Package included 30 pieces of rail hooks. Very useful for putting on the picture rail and holding up some lovely photo pictures, art work, canvasses, decorations. These will keep your items safe and even and once hung they dont move. . NICELY FINISHED- Zinc plating is corrosion-resistant . It has a high-temperature tolerance up to 120 while increasing the rail moulding hooks life expectancy. They are also nicely finished to match your modern decoration. . HASSLE FREE- If you are hanging heavy pictures, paintings, you dont need to bother to drill holes in your walls with plugs. Just hanging items from picture rails. The dado rail picture hooks hold very securely with no danger of falling off.