Flat round pin backs provide secure clutch closures for tie tacks, lapel pins, badges, service bars, and jewelry making. They serve as a reliable pin keeper and can be used as a replacement for standard pin backs. Multi-function pin keeper isolates sharp pins and keeps them in place. They are a strong replacement for pin clutch backs and are suitable for professional tie tacks. Replacement pin backs with a rubber backing deliver secure grip and resist loosening over time. They are ideal for craft projects and other pin-based work. Badge lapel pin back: each flat round back features a hole compatible with tie tack pins. They function as replacement flat round pin backs for badges and lapel pins. Use scenarios: - Replace worn backs on tie tacks or lapel pins in uniforms for secure, dependable fastening. - Use for badges and service bars on jackets or bags to prevent pin loss. - Apply in jewelry making or craft projects requiring reliable, long-lasting pin backs.