1PREMIUM MATERIAL: These sawtooth picture hangers are made from quality iron material which is sturdy and durable. 2EXTRA DURABILITY: With nickle plated iron, these sawtooth picture hangers has rust resistance and strong holding. 3FUNCTION: These sawtooth picture hangers are suitable for hanging photo frame, clothes and tools in cars and ships. 4SEAMLESS: The screws included in the package will not damage your wall, creating a clean and tidy environment. 5EASY TO USE: Sawtooth hangers is secured with double screws, providing more convenient installation. Item Type: Sawtooth Picture Hangers Material: Iron Surface Treatment: Nickel Plating Installation Location: It Can Be Used for Tools, Photo Frames, Clocks and Other Items That Need to Be Hung on Ships or Rvs Scope of Application: RV, Ships, Large Trucks, Etc. Serrated Product Aperture: Approx. 4mm / 0.15in 100 xSawtooth Picture Hangers 200 x Screws (1) the product is a small object, do not let children play with it. (2) the surface of the product is sharpened, so it is recommended to use it under gloves.