Compared to the mini grinders that I used in the same way in deburring work, there is no core shake even when increasing the rotation speed, and the point that the rotation speed does not drop even if applying force to the work surface is very easy to work Easy to use. Also, since the position of the exhaust can be adjusted, I also like the place which does not get in the way of work. Because there is little core shake, the finished surface is also beautiful and well received from suppliers. The spanner that installs the tip tool is also weak in strength, I think that it is rather unnecessary. I felt very favorable that the coupler was taped. From now on, all the workers in the factory will have 2 or 3 units and would like to use it.