Featuring 6mm inner width and 12mm outer width, these eyelets fasteners secure correct positioning for fabric, leather belt, bags, purse, wallet, tarpaulin and clothing while separation during use Ideal for multiple projects such as garment making, home decorations, outdoor gear repair, leather craft, and other fabric items requiring reinforced openings The included dedicated tools ( hole puncher and insertion plier) enable quick and secure eyelet fixing, suitable novices and skilled enthusiasts to increase work efficiency This collection includes 100 strong 6mm metal eyelets with matching washers in gold finish, along with essential tools 16.5cm eyelet tool, insertion rod, and storage bag for organized keeping Made from iron with coating, these eyelets resistance to rust and strength, ensuring stable use for various sewing and craft projects