12 Inch Rivet Nut Gun Insert Tool Set with Mandrels (M3–M8) – Heavy Duty Nutsert Tool for Professional Fastening The 12 Inch Rivet Nut Gun Insert Tool Set is a powerful and versatile solution designed for professional riveting and threaded insert applications. Built for durability and ease of use, this tool is ideal for metal fabrication, automotive work, furniture assembly, and DIY projects. Constructed with high-strength carbon steel handles (3mm thick), this rivet nut gun ensures exceptional durability and long-lasting performance. The 12-inch (300mm) long handle design provides maximum leverage, reducing effort and allowing smooth installation even in tough materials. The tool features a unique spring-loaded inner hex sleeve that automatically locks the mandrel rotation during operation. This enhances control, improves precision, and speeds up workflow. Equipped with 5 interchangeable mandrels and nosepieces (M3, M4, M5, M6, M8), this kit supports a wide range of applications. The quick-change system allows easy switching between sizes, making it convenient for multi-purpose usage. The ergonomic handles with double compound hinges provide increased leverage and reduce hand fatigue during extended use. Its compact and robust design also allows efficient operation in tight and hard-to-reach areas. This rivet nut tool is ideal for installing threaded inserts in metal sheets, plastic parts, wood, automotive components, and furniture. It delivers a reliable, efficient, and professional fastening solution for both experts and DIY users. Features: Heavy-duty 12-inch (300mm) rivet nut gun Made with 3mm thick high-strength carbon steel handles Includes 5 mandrels: M3, M4, M5, M6, M8 Spring-loaded inner hex sleeve prevents mandrel rotation Ergonomic handles with double compound hinges for high leverage Quick and easy mandrel change system Suitable for metal, plastic, wood, and automotive applications Ideal for professional and DIY use Specifications: Product Type: Rivet Nut Gun / Nutsert Tool Length: 300mm (12 Inch) Material: Carbon Steel Mandrel Sizes: M3, M4, M5, M6, M8 Max Working Stroke: 8mm Effective Stroke: 6mm Application: Threaded insert installation Package Contents: 1 × Rivet Nut Gun 1 × Wrench 5 × Nut Rods 5 × Mandrels (M3, M4, M5, M6, M8)