Practical set: Includes 200 insulation plate washers with an inner diameter of 0.58 cm and an outer diameter of 3.5 cm, suitable for most plasterboards on the market. The quantity is sufficient to meet various needs. High-quality material: Washers are made of high-quality galvanized iron, offering durability and resistance to rust and deformation. These stainless steel washers provide excellent performance in seismic conditions and resist weather, moisture, temperature extremes, and corrosion. Suitable for use with various wall materials. Unique design: Insulation plates feature a design that increases surface contact with the wall, enhancing load capacity and pressure resistance while significantly reducing the risk of surface peeling or damage. They offer reliable wall protection and are ideal for securing back walls and insulation panels to common floor and wall materials. Applications: Washers are compatible with various wall materials including thermal insulation boards, tile backwalls, plasterboard, composite panels, and extruded panels. They can also be used to attach building materials directly to frames, providing secure and easy support for mounting backboards and insulation panels on floors or walls. Easy installation: After securing the washers with screws, the insulating discs adhere firmly to the surface with edges flush to the board. The hole design on the mounting discs allows glue or mortar to bond effectively, minimizing the risk of surface peeling or damage.