Product Name: Cosmetic Screw Set, Flat Type; Product Number: EPA-S12F-15HL; Material: Stainless Steel; Cosmetic Bolt: Diameter (A): 0.5 inches (12 mm); Thickness (B): 0.3 inches (7 mm); Bolt Length: L0.6 inches (16 mm) (M6 x P1.0); Pipe Diameter: (A): 0.5 inches (1.0 mm). 0): 2 Tapping Screw: 1.6 x 1.0 inches (4 x 25 mm); Note: This product can be removed even after installation on a wall or other surfaces, so you can easily replace the sign board.