STRONG MATERIAL: Foam board fasteners are made of high quality metal, the outer is treated with anti-rust, sturdy and , not easy to deform or rust. EASY TO INSTALL: The board washers have grooves in the middle with drive screws, and raised on the back side, which can be inserted into the of the backing board to play a role in fixing, which can be easily done by one person. PRACTICAL: These foam board fasteners are the perfect fastener kit for securing and installing foam boards, backsplashes and more. They are efficient and practical, bringing great convenience to your . VERSATILE USE: These foam board washers are suitable for a variety of installations including home renovations, schools, hotels and other infrastructure installations, saving time and labor. Colour:As Shown Material:Metal Package Contents: 150 x screws 150 x spacers Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is 1-3cm.