This grinder has worked great for about 2 weeks after purchase. The first thing that happened was the entire motor assembly fell out of the mill itself and had to be taken back and repaired under warranty. Worked great for about a month more and the trigger stuck. Well, before you just had to pull the trigger and that would solve the problem, but now you can't pull the trigger at all and everything kicks into high gear when the airflow drops and you can't even pull the trigger. This is the second Air Cat tool I've had nothing but trouble with. I am a professional auto body technician and am more than happy with all my other tools, I will never buy an Aircat tool again!