Designed for heavy-duty applications, our stainless steel expansion screws and white plastic expansion tubes are ideal for both residential and commercial use. The coating on the screws prevents wear and damage, making them suitable for indoor and outdoor projects. Use them to mount heavy frames, cabinets, or any other items that require a strong and reliable hold. Features -Color:Black -Material:Stainless steel -Size:3.50X0.80X0.80cm/1.38X0.31X0.31in -Size:4.20X1.30X1.30cm/1.65X0.51X0.51in -Easy to use: proper for different base materials and thicknesses, bringing you a better using feeling -Tool box supply: a necessary and wonderful addition to any toolbox and a must-have tool for every homeowner -Protective coating: the plating ensures that the screws are wear-resistant and stable, extending their lifespan -Discreet design: the white plastic expansion tubes are designed to with most wall colors, providing a neat and tidy finish -Simple installation: these screws and anchors are easy to install, allowing you to securely mount items on walls with minimal effort Package list: 400 x screws 400 x anchors