Included: 50 sets spikes studs with screws in 5 different types, enough to your daily application and replacement, you can also share extra amount with others; 2 installation tools, these rivets are designed for reuse, convenient and practical. Durable: spikes and studs made of alloy, which is not easy to fade or wear , and each is with a fine finish, and with no casting lines, fine workmanship and durable. Multi-size and Multi-shape for wide application: screw back studs rivets contain 5 different sizes, can your requirement under different circumstances, can be applied to have combinations and effects. Easy to use: coming with install instruction, please refer to the images on product page. Just need punch a hole and screw on. They will definitely look cool with your DIY project. that you cannot missing. Various functions: punk style clothing accessories is ideas for decorating , necklaces, shoes, belts, jacket, dog , garments, clothing and more leather craft DIY making, a good helper and choice for handcraft and DIY your own decorations. belts, shoes, bags, necklaces and more, a good helper and choice for handcraft and DIY your own decorations= colour: black Material: Metal Package Contents: 50 sets x spikes studs with 2 Installation Tools Only the above package content, other are not included. Note: Light and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.