Features: Quality materials: Made from durable and good quality of metal material which makes it anti-rust and anti-corrosion. Eyelets grommets: These eyelets/grommets have inner hole of 10.5mm/0.41in. These eyelet grommets are used for fastening garment and leathers material. It will give you a nice finished looks on both sides of your leathers piece. Handy and easy to use: You just have to cut a hole in the fabric, leathers straps, clothing or leathers crafts then insert eyelets by pushing through, and finally secure in place with a squeeze of the punches. Versatile use: Grommets eyelets can be used in clothing, leathercraft, vinyls banners, holding, tents, fabric, curtains and other DIY activities. Please note: These eyelets come in 2 part the trumpet portion and the washer portion and eyelets fixing hand tool or plier not included in pack. Specifications: Material: Iron/Steel Color Options: 4 Colors are Available as Shown in the Picture. Package Weight: approx.290g Inner Hole Diameter: approx.10.5mm/0.41in (More Size Detail, Please See Photo.) Package Includes: Set of 500Pcs Eyelets Rings Kits note: Please allow 1-3mm error due to manual measurement. Please make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thanks!