Handy sewing‑machine maintenance set that helps keep machines and sergers performing smoothly between services. Includes a large screwdriver for needle, foot and throat‑plate screws; a small screwdriver for bobbin‑case tension; and a soft cleaning brush to remove lint from the bobbin race and feed dogs. Useful for routine care at home or in the studio. Follow basic installation guidance and test on a scrap to confirm placement and handling.