The tool-free quick-change head design makes it simple to change mandrels and nose pieces quickly without the need for additional tools, smooth your project, and save your time. STRONG AND DURABLE The rivet nut tool is made from thick carbon steel with heat-treated, and black phosphating finishing protects against corrosion. With the designed structure and tough materials, it is sturdy and durable enough for long-life performance. Unique spring-loaded inner hex sleeve automatically locks the rotation of hand installed mandrel Made with durable alloy steel with rubberized handles for added comfort especially when used for extended periods Great for sheet metal fabrication 3/25ł(3mm) high-strength carbon steel handles make the rivet nut gun more sturdy and durable,11 specifications to interchangeable mandrel meet the needs of work 7 American Standard Threads M3 M4 M5 M6 M8 interchangeable mandrel/nose bridge kits in various sizes. The M8 spindle is already on the tool, so the plastic box is empty. We truly believe we make some of the most innovative products in the world, and we want to make sure we back that up with a risk-free ironclad 45 day guarantee. If you don't have a positive experience for ANY reason, we will do WHATEVER it takes to make sure you are 100% satisfied with your purchase. Buying items online can be a daunting task, so we want you to realize that there is absolute ZERO risk in buying something and trying it out. If you don't like it, no hard feelings we'll make it right. We have 24/7/365 Ticket and Email Support. Please contact us if you need assistance. Remember: Shipping usually takes 2-3 weeks read our Shipping for more details!