strength thread for aluminum alloys using wire thread inserts to create durable female threads. Costeffective solution for repairing threaded holes in aluminum components, delivering economical and reliable restoration of function. Convenient conversion between metric and inch threaded holes with wire thread inserts, enabling flexible compatibility across parts and assemblies. Multipurpose kit with 50 pieces to meet a range of replacement needs and applications, suitable for various projects. Use scenarios Automotive and machinery : restore stripped or damaged threads in aluminum engine components such as engine blocks or cylinder heads, or in aluminum housings and mounting brackets to regain secure fasteners. Field retrofits and upgrades: convert existing holes from metric to inch or from inch to metric during part replacements, enabling compatibility with different fasteners without replacing the component. Maintenance and fabrication: use in educational or workshop settings for routine repairs and custom assemblies that involve aluminum parts and standard thread standards.