Material: Made of durable brass, they are sturdy and resistant to corrosion and rust. Eyelet installation tool for reinforcing holes and preventing tears. Practical: These durable eyelets are easy to use and are perfect for canvas, tarpaulins, tents, awnings, belts, clothing, handbags, bags and other items. Easy storage: All eyelets and tools are included in a transparent storage box. Makes it easier to find matching components. Grommet dimensions: inner diameter of the hole: 12 mm, outer diameter: 20 mm, height: 4.5 mm. Features: First punch a hole in leather, leather strips or clothing with the punching tool, then use the hammer to press the eyelets into place. This is a set of practical tools for adding ornaments to your crafts. Note: The data are all manually measured, please allow an error of 1-3cm, due to the difference in light and color, there will be a certain color difference. The actual object received shall prevail. Note: The data are all manually measured, please allow an