HEAVY DUTY HOOK: This stainless steel ceiling and wall hook is ideal for hanging heavy equipment and decor. Our set consists of 1 swivel hook, 1 fixing hook, 2 screws and 2 expansion screws. The main plate measures W7 x D4 x H9.6cm, while the hook measures L8 x W4cm. For full measurements, see picture 2. The swivel hooks can hold a maximum load of 400kg. 304 STAINLESS STEEL: This qualitative 304 stainless steel ring is extremely durable and strong. The material is very hard, non-toxic and environmentally friendly. Stainless steel does not rust and resists corrosion, and these hammock hooks can be set up indoors or outdoors, they are ideal for professional purposes and withstand long-term use. They are easy to clean and can be attached and removed several times. EASY INSTALLATION: Each sandbag hook is drilled with 2 holes for easy attachment to the ceiling or wall. Hexagon screws (expansion screws) are made for concrete and other screws are made for wood surfaces. Our kit is easy to install and no complicated assembly is required. The innovative concept of this swivel hammock hook allows for full 360° rotation. So there will be no twisting or tangling of the hardware. VERSATILE CEILING SUSPENSION HOOK: Ideal for hanging a ceiling light, these swivel hooks have many uses. Set up your hammock, swing, hanging chair, aerial yoga strap, sandbag, playground or porch swing, gymnastic ring, Olympic ring or resistance band. They support your equipment for a long time. Use them for smaller decorations, such as pots, lanterns and other light fixtures.