This is a metal frame fan grill with bright nickel chrome plating. It is used for the protection of the fan. Special all metal blade defender and anti-scratch enumerating cage design. The fan grill creates a protective barrier between a fan’s blades and any foreign objects it may come into contact with. The metal net can be fixed on the fan, it covers the fan very well and has no influence on the cooling effect. It is also very ideal protection against electronic parts injuries caused by fan blade rotating.These fan grills offer protection from fast-spinning fan blades and prevent cable damage. Stops all size fingers and other intrusions from destroying major components of system. What do fan grills do? Fan grills offer protection from fast-spinning fan blades and prevent cable damage. What are fan grills made of? Electric fan guard grills are made form high-quality raw steel materials, such as galvanized steel wire, and black or white plastic-coated steel wire.