QWORK Foam Board Fasteners Washers, 500 PCS 1-1/8" Steel Washers for Fixing Insulation Board Foam Board

Quantity: 500 pieces. Size: Diameter: 1-1/8 inches. | Material: Galvanized steel. Anti-rust galvanized outer surface. | Installation: Easy to install with a groove in the middle and a convex back for surface insertion. | Practical Use: Designed for fixing and installing foam boards and backboards to improve working efficiency. | Applications: Suitable for home decoration, schools, hotels, and other infrastructure installations