Material: They are made of durable metal, sturdy and resistant to corrosion and rust. Eyelet installation tool for reinforcing holes and preventing cracks. Practical: These durable eyelets are easy to use and perfect for canvas, tarps, tents, awnings, belts, clothing, purses, bags and other items. Easy storage: All eyelets and tools are included in a transparent storage box. Makes it easier to find matching components. Eyelet dimensions: inner diameter of hole: 12 mm, outer diameter: 21 mm, height: 6 mm. Features: First drill a hole in the leather, punch out leather strips or clothing with the punching tool and then use the hammer to attach the eyelets. This is a set of practical tools for adding embellishments to your crafts. Good quality. Pack of 100 silver eyelets and 3 installation tools to meet your different needs. The eyelets are made of durable and strong copper. Easy to use: You can easily repair the eyelet set by yourself. Useful accessories for leather, canvas, tarpaulins,