CRUSH RESISTANT AND DURABLE: These four silver sliding aluminum boxes are made of sturdy metal. Metal materials are corrosion-resistant, wear-resistant, and pressure-resistant, making the metal box highly durable and pressure-resistant, protecting the contents inside from damage and allowing it to be used for many years. Safety and convenience: The sealing performance of metal boxes is usually very good, safe and reliable, and can effectively prevent moisture, dust and gas from intruding into the box. This sealing property allows the metal box to protect the items inside from the outside environment and keep the items dry and clean. EASY TO CARRY: Each box is small enough to fit in a purse, backpack, or luggage, making it easy to carry essentials for use anytime, anywhere. Beautiful and elegant: The appearance design of metal boxes is usually simple and beautiful, with a noble and elegant temperament. This design makes the metal box not only practical, but also can be used as a decoration, adding a sense of fashion and beauty to the home or office. Widely used: Metal boxes can be widely used in daily necessities, jewelry and other industries. Metal boxes can hold a variety of small items, such as small rubber bands, earrings, necklaces, bracelets, nails, etc.