OverviewThe metal guard is constructed of C1008 Steel with a nickel chrome finish. It has four holes which can be screwed onto any cooling fan with a 60 millimeter square frame. Able to withstand 220 pounds of pull force at each joint, the guard was designed to withstand heavy usage. UL Listed. ApplicationsThe fan guard creates a protective barrier between a fan"s blades and any foreign objects it may come into contact with. The blade is fragile and can be damaged if impacted by a foreign object during use. At high speeds, it can also cause damage to wires and fingers on contact.