Our galvanized iron board washers are designed to provide a secure hold for gypsum boards and other insulation materials. These washers are suitable for use in constructing background walls, offering a firm grip that prevents the boards from shifting. To install, simply place the washer over the fastener and tighten. Made from robust galvanized iron, these washers are resistant to tear and wear. Features -Color:Silver -Material:Galvanized iron -Size:3.50X3.50X0.30cm/1.38X1.38X0.12in - Inner diameter: 0.58cm; Outer diameter 3.5cm - : these washers are keep from harmful substances, making them ideal for use in environments where health is a priority, such as children's rooms and healthcare facilities -Robust design: made from robust galvanized iron, these washers are highly resistant to deformation, suitable for use in wet areas like kitchens and bathrooms -User friendly installation: these washers are designed for easy installation without the need for professional assistance, suitable for diy home improvement projects -Reliable attachment: these washers ensure that wall decoration materials stay firmly in place, addressing the issue of materials falling off easily -Versatile design: these washers provide a solution to the design options of traditional wall decorations, ideal for users seeking to personalize their decor Package list: 100 x gypsum board washer