4 Colors: stainless steel, gold, rainbow, black. Different colors paired with different accessories can help connect your favorite necklace or bracelet. With the help of buttons, DIY will become simple and interesting Robust and Durable: Our spring rings are made of high-quality stainless steel, with a plated and polished surface and high gloss. It is not easy to fade, deform, and break after long-term use. They are lightweight, beautiful, and durable Easy to Use: Built-in spring hook, easy to use. Just press, quickly connect and release, and it will automatically close, opening and closing smoothly. It is easy to operate and can quickly and safely connect various fixed points. Versatility: Suitable for everyday use, such as attaching to backpacks, handbags, belts, wallets, or as a key ring. They can also be used for homemade crafts or gifts. Or you can put it on your sports bottle. Size: about 13~14mm diameter, 3.5~4mm thick, 4pcsthe appropriate size is sufficient to meet your DIY process production project