Review on 🔧 HIFESON Industrial Grade Pneumatic Rivet Nut Gun with Self-Locking Head, Quick-Change Mandrels (1/4, 5/16, 3/8): Adjustable Speed Rivet Nut Tool by Bryan Covington

What I don't like is that the air regulator has numbers to measure air pressure. If you open it wide, the 1/4 x 20 screw will break. You should definitely adjust the air pressure depending on the size you're using. If you're using a 3/8 nut, you'll probably set it wide open. I would suggest practicing with a few of them until you like the results. what i like about it It's easy to change the mandrels to a different size. Nice looking pistol. Very responsive when you pull the trigger. Well packed. I looked at the McMaster Carr and it was $600 a unit and that was just for a one size mandrel. Granger didn't have them at all. For the price you can't go wrong. It is made in China. That's the part I hate