[Heavy Duty Material]Our ceiling hooks are made of premium carbon steel to ensure they are strong, durable and rust resistant, with a high load-bearing capacity of 15kg. The circular gaskets and spring toggle wings are galvanized for extra durability and corrosion resistance. [Firmly Catch] The screw in hooks are specially designed with a butterfly shape spring toggles that is an anti-rotation structure. When tightening the screw, the two pairs of wings of the spring toggle will expand to the sides automatically, thus increasing the tightening force and preventing the screw from rotating with the drilled hole. The deep and clear thread of the ceiling screw also helps firmly catching. [Space Saving & Keep Tidy] These hooks for hanging takes up almost no space. They save space and help you store and organize items easily. Keep your rooms tidy and your household items in order. [Convenient Installation] These M6 ceiling hooks are simple to install. Simply drill a hole of the required diameter, fold up the hook wing, tuck it into the hole until the hook wing springs open automatically, then tighten the screw until the hook loop is secure. 85mm casing length can be used on most thick wall panels. 25mm round washers can help you block the holes to make the wall more attractive. [Wide Application] These ceiling hanging hooks are versatile, which can be widely used for gypsum board, hollow wall, particle board, fibreboard, partition board, wood board and so on. Great for hanging plants, flower pots, lamps, wind chimes, curtains, cups and more. Save you more space and make your home more neat and tidy.