Package includes: 200pcs metal studs. How to use: 1.Put it on the position you want. 2.Press it until 4 prongs pass through the fabric. 3.Flip to the other side of the fabric. 4.Fix 4 prongs. If the material is too thick will not be able to penetrate directly, you need to use the tool to make a few holes, put the stud on and fix 4 prongs. The nailhead square studs rivet are suitable for your DIY projects, such as purse, bags, handbags, backpacks, shoes, jackets, clothes, belts, DIY Crafts, jeans. Make them be more beautiful as while protecting them from damage.