Specifications: Material: metal Grommet Outside Diameter: 1/2 inch Grommet Inside Diameter: 6.4mm, nearly 1/4 inch Grommet Flange Width: ~3mm Package Content: - 400pcs gold and silver Metal Eyelets - 400pcs Washers - 1x Portable Handheld Manual Grommet Pliers Features: - Carbon steel construction and special anti-friction plastic material, durable and easy holding - Easy to use and portable, can be put in the kit to take to any place - With the correct opening angle, you can press it by only one hand - Manual eyelet puncher in light weight is very easy to take and convenient to use because of its redirecting transmission Usage Instructions & Key Warnings: - Intended Use: This is a light-duty, decorative grommet kit. It is ideal for materials 1-3mm thick such as leather, paper, cardstock, thin tarps, and elastic bands. It is NOT designed for heavy pulling. - Material Warning: Do not use on foam board, fabric, cloth, or any heavy-duty applications. These materials can damage the tool and will not yield good results. - Mandatory First Step: You MUST punch a pilot hole before setting the eyelet. The grommets themselves are not designed to puncture material. Attempting to do so will damage them and the pliers. - Correct Operation: Always follow the manual for the correct orientation of the grommet, washer, and pliers. Applying firm, even pressure is sufficient. Excessive force or incorrect alignment will bend the pliers' handle. - For a Secure Hold: Always use the included washer with every eyelet. This is essential for making the connection strong and preventing it from loosening. - Note on Design: The bottom of the eyelet is designed to flare out (a "flowering" effect). This is normal and not a product defect.