Grommet kit: Includes 100 piece grommet kit (with 100 grommets and washer, individually wrapped in PE bag), punch tool and attached tool, all in a damage-free plastic box. Size: Internal diameter: 12 mm (1/2 inch) and outside diameter: 21 mm (5/6 inches). With plastic storage box, approx. 6.9 x 3.9 x 1.3 inches / 14 x 8 x 3.3 cm. Excellent material: The eyelet kits are made of quality copper-nickel and surface galvanized, with high corrosion resistance and a shiny appearance, very difficult to oxidize. Easy to use: The eyelet kit facilitates installation. First use the punch tool to punch a hole in the tarp (fabric), then take the set of eyelets and finally secure the set of eyelets with the attach tool. Please put rubber pad or wooden board when drilling holes to prevent the puncher from foaming. Wide range of uses: The grommet kit is suitable for canvases, tarpaulins, tents, curtains, backpacks, leather crafts, repair and decoration. (Materials with a thickness of less than 1 mm) ". Our products are made with the highest quality materials and are designed to provide you with the best possible user experience. We strive to ship out all orders within three days of purchase, and the estimated delivery time is 8-15 days. When shopping, please pay attention to the size and dimensions of the product to ensure that it meets your needs. In the title and , we have provided detailed information about the product, including its features and specifications We want you to be completely satisfied with your purchase, so if you have any questions or concerns, please don''''''''t hesitate to contact us. We are here to help and will do our best to assist you. Thank you for choosing our product. We hope you enjoy it