My shop has tried most all of the cordless tools,( with exception of the cheaper brands like Ryobi etc). We have settled on Milwaukee. I am a superintendent of electricians at a steel mill, a harsh climate to say the least, and I have to say these are the absolute best tools Ive worked with. My guys are super rough on things and they hold up fantastic. This includes the angle grinders. I wouldn't hesitate to recommend to anyone. They are 18 volt, I use several in my personal shops.