Easy to useSimple attaching tarpaulin eyelets with the appropriate hole cutter and mandrel. The characteristic pattern on the surface of the mandrel is rough to prevent slipping and provides a secure grip With a plastic storage box All these rivet sets and tools are packed in a transparent storage box with removable baffles, which allows you to find the right components and save time Quality These tarpaulin grommets are made of sturdy metal and are resistant to corrosion and rust. Inner diameter 8mm1/3 inch), outer diameter 14mm0.55 inch), height 4mm. Useful ToolsThese durable paper grommet tools are easy to use and suitable for denim, canvas, tarpaulin, tents, awnings and other fabric items. Package ItemsThe eyelet kit set includes a hole punch, a matching mandrel and 100 sets of eyelets (each set contains 1 eyelet and 1 washing machine) and a storage box.