Making the product itself is somewhat nuisance. Particularly with respect to the part sandwiching the tip of the tip, there is some misalignment. Also, you can see the suitability of the welding of the root. It is imaginable that the tooth breakage is caused by the displacement as the force is added. Level for hobby. It is dangerous as a business tool. If it is made in Japan, we will claim it, but since it is an imported item, I felt that I had no choice but to convince.