Grommet Washer Tools: This tool includes 100 grommets (with 100 grommets and 100 washers), a drilling tool, and a clamped tool, all in a clutter-free plastic box. Excellent material: The grommets are made of quality copper-nickel and galvanized on the surface, with high corrosion resistance and shiny appearance, very difficult to oxidize. Easy to Use: Installing the grommet set is very easy. First, make a hole in the canvas with a piercing tool, then take the buttonhole kit, then securely attach the grommet kit with the holding tool (the full steps are shown in the image, which is a more direct view) Eye size: 10mm hole inner diameter, 15mm outer diameter and 97mm barrel length. Wide applications: they are a cost-effective solution for repairing tarpaulins, tents, etc.