Check the listing for details. 58pcs Manual Rivet Nut Tool Kit M3-M10 Carbon Steel Threaded Inserts Auto & DIY. Condition: New. Listed at 18.03 USD. This 58PCS rivet nut kit is made of durable carbon steel, offering high strength and reliable performance for long-term use. Includes M3 M4 M5 M6 M8 M10 sizes, ideal for various rivet nut tool kit, threaded insert, and rivnut tool applications. The manual installation process is quick and simple—drill, insert, and tighten to create secure threaded inserts without special equipment. Perfect for beginners and professionals alike. Widely used in automotive repair, metal sheet fastening, machinery, DIY projects, and home improvement tasks. Compatible with most hand tools and suitable for different metal materials. Compact and portable design makes it easy to carry and use anywhere. A practical nutsert tool kit for everyday repair needs. (No storage box included).