Leather-Wrapped Button (NO.5 Hook Type) 12mm Black Leather Color: Black Diameter of Leather-Wrapped Button Head: Approximately 12mm Material of Leather-Wrapped Button Base: Brass Base Color: Gold Material of NO. 5 Hook (Hashihato): Iron Hook Color: Gold (Can be changed to Nickel or Black Nickel) Quantity: 3 sets [Installation Method] Same as the installation method for NO. 5 spring-type hooks. A NO. 5 punch is required. To prevent scratches on the surface of the leather-wrapped button, place cardboard (magazine) or a scrap of leather on the anvil and attach the spring part of the hook with a NO. 5 hook punch. Also, you can choose from three hook colors: gold, nickel, and black nickel. If you wish to change the color to something other than gold, please be sure to inform us in the comment section when purchasing. [Notes] The leather thickness is approximately 2-3mm, and it should hold securely.