Our expansion screws and plastic tubes are engineered to provide a secure and stable mounting solution for various wall types. The stainless steel screws offer high strength, while the white plastic expansion tubes ensure a tight fit. Ideal for drywall, concrete, and plaster walls, this kit is ideal for any DIY enthusiast or professional contractor. Features -Color:Black -Material:Stainless steel -Size:3.50X0.80X0.80cm/1.38X0.31X0.31in -Size:4.20X1.30X1.30cm/1.65X0.51X0.51in -Ample supply: with ample pieces in each pack, you'll have plenty of screws and anchors for multiple projects, ensuring you never run out -Stainless steel: made from stainless steel, these screws are built to last and resist breakage -Stable plating: the plating adds an extra layer of tear resistance, making these screws suitable for various environments -Aesthetic design: the white plastic expansion tubes are designed to be visually appealing, maintaining the aesthetic of your walls -Easy to use: these screws and anchors are designed for easy installation, making them ideal for both diy projects and professional use Package list: 400 x screws 400 x anchors