Our grommets are made of alloy material, anti-tension, , ! Besides a base, a puncher and an install rod, we also prepared a hammer mallet for you, which will be more convenient for your craft installation. Features -Color:Assorted Color -Material: Alloy. -Size: About 0.90X0.50X0.38cm/0.35X0.20X0.15in. - With these full range installation tools, you can start a grommet repairing projects by yourself easily! - The punch tool can be applied to a hole on the craft, then the hammer can be used to beat it without scratch left! - They are useful accessories for , tents, awnings, canvas, tarps and other cloth-made items. - You can widely apply them into bags, shoes, clothing, shoelaces and other DIY crafts projects! - Snap fasteners kit with 500 sets snap buttons, enough quantity is useful to make your crafts, and enough for meeting your different needs. Package list: 500 sets x eyelets buttons 1 x hammer 1 x punch 1 x install rod 1 x storage box