100 Sets Self Stick Insulation Pins 2-1/2inch, 1.5 Inch Self Locking Washers Round 7/8 Inch Aluminum Insulation Hangers

Material: These board washers are made of metal, sturdy, corrosion, and easy to use. Function: These fixing washers fix the support plate on the floor or wall, they are an essential component for installing the tile back plate. Durable: These butterfly-shaped washers are not easily deformed. The perforation of the fixing disk allows the adhesive or plaster to stick to the board's surface, as well as minimizing the risk of surface stratification or damage. Application: Used for fixing insulation board, ceramic tile support board, gypsum board, insulation board, etc.