This pneumatic rivet nut gun is a top - notch tool for industrial use. It comes with 1/4, 5/16, and 3/8 mandrels, suitable for various riveting tasks. The self - locking gun head enables easy and fast mandrel assembly and disassembly, saving time and effort. With a speed adjust knob, you can control the gas size, adjusting the work intensity and speed as needed. The connecting rod is made of impact - resistant steel S2 material, which effectively reduces wear and shaking. The high - quality rotor, forged from high - quality alloy steel, ensures high accuracy and strong wear resistance. The embedded muffler vent keeps the work noise under 65db, protecting your ears. Its dimensions are 8.3 x 6.5 x 1.8 in. and it weighs 4.18 pounds. Remember to lubricate the screw before use and check the nut bearing regularly to ensure smooth operation. Ideal for industrial assembly lines and DIY projects, it provides convenience and efficiency for your work.