Description: Alloy steel forged pipe head, durable and long lasting. Light and portable and riveting smoothly and firmly. M3/ M4/ M5/ M6/ M8/ M10 Model Optional, electric riveting gun head rivet nut gun adapter head ram gun accessories. The adapter tap screw is connected to the electric drill, and the electric rivet gun is quickly transformed. As tool accessory, this rivet gun can be combined with 12-36V electric drill, perfect tool for your home DIY or outdoor use. Wide applications on production of doors and windows, riveting of aluminum alloys, automobile manufacturing and production, etc. Specification: Color: Black Type: Rivet Gun Adaptor Material: Alloy Steel Model Option: M3 / M4 / M5 / M6 / M8 / M10 Size Chart: M3: 5mm M4: 6mm M5: 7mm M6: 9mm M8: 11mm M10: 13mm Package Includes: 1 PC Rivet Nut Tool Tip Note: 1. Please allow slightly error due to manual measurement. 2. Due to the difference between different monitors, the picture may not reflect the actual color of the item. 3. Wish you a wonderful on-line shopping!