Closed round head rivets (closed rivets) are composed of two parts: the body and the core. The use of professional tools to clamp two workpieces in the product at the location where the rivet core causes plastic deformation of the rivet body, achieving riveting and fastening. Designed to wrap around the shaft head after riveting, it is very suitable for various applications with waterproof requirements. It has the characteristics of high shear force, anti vibration, and good sealing performance of high-pressure connectors. Easy to operate, excellent riveting, beautiful appearance, high physical performance, and the characteristic of one-way riveting operation. Materials include stainless steel, aluminum, iron, and other materials. Closed rivets are widely used in fastening fields such as automobiles, ships, decorative construction engineering, electronic industry, food machinery, and mechanical equipment.