Features:1.Hollow Expansion Secure Bolts: Heavy-duty hollow drive wall anchor expansion when installing, providing strong bearing capacity and safety. 2.Various Size for Most Walls:There are a variety of bolts sizes for you to choose for meeting your different needs. Suitable for a wide range of thicknesses of hollow walls. 3.Heavy-duty Hanging Helper: The Hollow Expansion Bolts are made of high-quality zinc plated carbon steel, rust resistance, and corrosion resistance, durable enough for you to hanging items like curtain rods, lamps, photo frames, coat racks, and much more.4.Wide Range of Application: Perfect for cavity anchor plasterboard fixing, widely used in drywall, hollow block, plaster, tile, perfect for hanging curtain rods, lamps, photo frames, coat racks, power switches. Convenient for your daily life.5.If you have any question, please feel free to contact us.We will try out best to help you. Notice:Please allow 1-3cm deviation due to manual measurementActual color may be slightly different from the image due to different monitor and light effect:Material:Zinc PlatedStorage Box Size:20.5*10.3*3.2cmPackage List:1 set x Heavy Expansion Bolt Set