During a two year period I have had three of the same HF grinders. The first two the lock buttons came apart & were exchanged, no hassle. The third one I got back in June just flat out died for no reason hanging on my bench. I thought no more of this model. It cost me $30. so I'll see if I can upgrade to a different model. I explained to the clerk & like always no problem. This Hercules brand is a new line of power tools. It was $40. but the clerk said I'll just give you an even exchange. I also bought the two year warranty for $21. Although I haven't used it yet it seems well built, runs smoother, more quiet & has 7 amps compared to the other one I had was 6 amps.
Here is a pic of mine & also a video link of a breakdown comparison of their other models. The dark blue one on the right in the video from Chicago Tool was the one I had so much trouble with.
Edited by Sawdust, August 25, 2017 - 04:37 PM.