Features Durable: The connecting rod of the pneumatic rivet nut gun head is made of impact-resistant S2 steel, and the overall heat treatment is hardened, which effectively avoids the wear of the connecting rod, reduces shaking, and is more durable. High-quality Products: The head of the pneumatic rivet nut is made of high-quality carbide material, which has high strength, strong wear resistance, not easy to corrode and rust, and has a long service life Simple Installation: The automatic rivet nut gun head has a self-locking function, allowing you to quickly assemble and disassemble the mandrel without tools, effectively improving your work efficiency, convenient and fast Model: This pneumatic rivet nut gun head has 7 models, which are M3, M4, M5, M6, M8, M10, M12 rivet nut gun head assembly, you can choose the appropriate model to replace Note: As the frequency of use of the pneumatic rivet head increases, the mandrel will be worn, please replace it as needed to prolong the service life of the head and reduce the cost of replacing the head. Any other questions, you can contact us by email Specification: Item Type: Pneumatic Riveter Head Material: Carbon Steel Optional Specifications: M3 M4 M5 M6 M8 M10 M12 Uses: Used for pneumatic rivet gun head replacement, suitable for rivet nut. Package List: 1 x Pneumatic Rivet Nut Gun Head (Set) Package List 1 x Pneumatic Rivet Nut Gun Head (Set)