Easy to use: These metal studs at the bottom easy to pierce through materials like leather or fabric without much effort,if the material is too thick not be to penetrate directly, you only need to use the tool to make a few holes and screw on Made: Made of metal with a smooth , fine workmanship, these metal spikes with 4 prongs, and firm claw ,at the same time, pay attention to scratch hands when useing Size and color: Each punk studs measures 10 mm x 10 mm/0.39 x 0.39 inch, in a silver color that adds a stylish and shiny touch when added to clothing or accessories 1000pcs: You'll receive 1000 pieces of these versatile studs for clothing,great for daily use, DIY projects, and sharing with friends; Note that tools are not included Decorative: Suitable for various styles like punk, rock, and bike ornaments, these pyramid studs are great for decorating your items such as belts, shoes, jackets, backpacks, or even pet collars, Weight: 0.55336027762 pounds, Manufacturer: Wadakada