This tool is easy to use thanks to its excellent balance. The large trigger switch can be locked in this position for extended use, reducing user fatigue, while the rotating switch knob provides comfort and control. In addition, the internal labyrinth design prevents dust and dirt from damaging internal components, which extends the life of the device.
The standout feature is of course the variable speed, but this slows down considerably when pressure is applied to the work. The body feels like two parts as it moves at the joint. I would say it's an improvement over Harbor Freight mills which don't have variable speed. Good enough for limited work but gets very hot. The lower speed limit is 5000 rpm, which can be too fast for polishing the stone.
First of all, the text on the box actually says 'Angel Grinder', and this error in the base translation is a warning signal confirmed correct as soon as you open the box. This is a cheap Chinese plastic meat grinder. And it is absolutely not a variator. It has an on/off trigger and nothing else. I returned it because I needed variable speed, but I wouldn't buy a piece of junk that could break and seriously injure you.
Pros
Sturdy die-cast aluminum gear housing can take a beating