Many are made from natural black buffalo horn, and the pointed or rounded parts are used to stimulate acupressure points. It's good to use two at a time on both sides of the face, so they come in sets of two. They are used for beauty and health purposes such as facial and body acupressure, lymphatic massage, promoting blood circulation, and reducing swelling. They come in various lengths and shapes and can be used differently depending on the purpose. They do not generate static electricity. As they are a natural material, they have unique patterns, grains, and cracks. Do not place them in high-temperature, high-humidity, or dry places. When not in use, apply oil and store them in a zip-lock bag. Please purchase with your understanding.