Main material: steel Rivet nut material: aluminum alloy Handle cover material: rubber Total length of hand tools: approximately 17 cm/6.6 inches Nut rivet mandrel size: M3/M4/M5/M6/M8 Features: Rivet nuts are made of aluminum alloy, providing strength, corrosion protection, and long service life. Includes a wrench for securing the handle and adjusting the spindle.An ergonomic tool made of steel with a non-slip handle. Durable and easy to use. Suitable for repairing cars, trailers, furniture, and even shipbuilding.With open ends, small flanges, round holes, threaded inner walls, and some non slip surfaces, these flat headed rivet nuts have excellent fastener functional performance. There are various sizes, M3, M4, M5, M6, M8, which typically have a low profile compared to other nuts.Each size includes many rivet nuts, so you don't have to go to a hardware store to find rivet nuts for a while. It is equipped with a rivet machine and many spindle and objective lens converters for easy riveting. Color: Blue+Black+SilverPackage includes: 1 * nut rivet tool, 5 * nut rivet mandrels: M3/M4/M5/M6/M8, 20 * M3 thread rivet nut inserts, 20 * M4 thread rivet nut inserts, 20 * M5 thread rivet nut inserts, 10 * M6 thread rivet nut inserts, 10 * M8 thread rivet nut inserts, 1 * plastic storage box, 1 * instruction manual Note: 1. Due to manual measurement, please allow a small error. Please make sure you don't mind before bidding. 2. Colors may vary depending on the display. Please understand. Hello, please pay attention to your shipping address when purchasing products. If your receipt information (such as name, street, house number, doorbell/email without name, etc.) is incorrect, the order will not be delivered correctly