200Pcs Flat Washers for Screws and Nail for Screws and Nails Accessories Plate.Flat Washers is suitable for foam board, expanded polystyrene board, extruded polystyrene, foam insulation board, gypsum board.Our flat washer is made of iron material, cold and heat resistant, lightweight.The flat washers are not just spread the load and prevent damage to wall ceiling insulation board, foam panels, or sheets during installation, but also have a function on fix and fasten the screws through its center hole.You will receive 200pcs flat washers for screws and nails, enough for your daily use.Round foam board washers with high bearing capacity, good shock absorption effect, not easy to deform, good insulation.Washers for Installation of Foam Board Panels. Steel Washer for Fixing Fastening Installation. Foam Board Fasteners for Insulation Board. Foam Board Insulation Hardware Fixing Fastening. Wall Washer for Fixing Fastening and Supporting. [Material]: Our flat washer is made of iron material, cold and heat resistant, lightweight. [Feature]: Round foam board washers with high bearing capacity, good shock absorption effect, not easy to deform, good insulation. [Package Content]: You will receive 200pcs flat washers for screws and nails, enough for your daily use. [Multifunctional]: The flat washers are not just spread the load and prevent damage to wall ceiling insulation board, foam panels, or sheets during installation, but also have a function on fix and fasten the screws through its center hole. [Application]: Flat Washers is suitable for foam board, expanded polystyrene board, extruded polystyrene, foam insulation board, gypsum board.