Package: Hole diameter Ø 14 mm, opening angle 180 degrees. (Note: The package does not include screws; one side is equipped with expansion screws; a groove is required for installation.) Material: The barrel hinge is made of brass, providing resistance to corrosion and oxidation. This ensures that the hinge will not rust even after prolonged use, maintaining a shiny appearance and improving the overall quality of the product. Smooth Opening: The hinge design is precise, allowing for extremely smooth opening and closing. These concealed hinges can be opened and closed freely, minimizing noise when the door closes. The reinforced arms increase the load capacity, making the hinge more solid and stable. Concealed Design: Once installed, the hinge is not visible from the outside, providing a simpler and more elegant appearance, enhancing the aesthetics of high-end boxes such as jewelry boxes, and maintaining a refined appearance. Widely Used: These cylindrical hinges are widely used for furniture, decorative boxes, gift packaging, and more. Whether for home furniture or DIY projects, you can use these small barrel hinges to make pens, pencils, or other small boxes.