Product Description Features: High-strength Material: The rivet nut installation kit is made of high-alloy steel, with high hardness, strong corrosion resistance and long life after heat treatment, and its hardness is 58 HRC. Iron phosphate pretreatment can improve the corrosion resistance of steel, more robust and durable. Various Mandrel Sizes: This kit is equipped with a rivet gun, matching mandrels and nose bridges, and a multifunctional support wrench. We have multiple interchangeable parts for you to choose from. Metric M3, M4, M5, M6; standard SAE 1/4-20, 10-24, 8-32, 6-32. Easy-to-Use Sturdy Tip: You can easily replace the riveting rod by simply turning it clockwise a few times. In addition, there is an easy-to-pump sleeve to help replace the mandrel. After installing the rivet, you can easily unscrew the threaded rivet nut by simply turning the knob. If the riveting process cannot be carried out successfully, don’t worry. There is a troubleshooting hole. You can use the L-wrench to help with the job. Specifications: Material: Alloy Steel Weight (with Package): 900g Package Size: 22 x 13.5 x 3.5 cm Package Includes: 1 x rivet gun 1 x wrench 1 x M3 Mandrel 1 x M4 Mandrel 1 x M5 Mandrel 1 x M6 Mandrel 1 x 6-32 Mandrel 1 x 8-32 Mandrel 1 x 10-24 Mandrel 1 x 1/4-20 Mandrel 8 x small boxes 8 x turnbuckles 1 x cowhide package box