【Product Description】You will receive a pack of 500 black screw covers. Each plastic screw cover measures about 12mm in diameter, 2.5mm in height, with a hole of about 3mm in diameter. 【Material】The screw cover head is made of high-quality PP plastic, which is resistant to aging and waterproof, providing effective protection against corrosion and long-term durability. 【Practical Design】The cross-slot shape ensures that the screw is firmly held in the screw cover, preventing accidental falling. In addition, this design prevents moisture and rust of the screws. 【Easy to use】You just need to put the nut on the screw, and then install the screw with the screw cover wherever you want. 【Wide scope of application】These anti-rust screw covers are suitable for cross-head screws and can be used in various environments such as homes, schools, courtyards, shops, offices, etc.