It was very useful for peeling off strong coking. Even work that breaks teeth if it is made by other manufacturers will not break at all. The material is hard and it is difficult to spill teeth, but on the other hand it is difficult to break a worn out tooth. . As with other manufacturers it will not break easily, it will not break unless you put quite a force by pinching with pliers. Also, the dial lock is locked solidly, but it seems that the tooth size is loose compared to the main body, so even if it locks exactly, I do not like the teeth to rattle every time I put power on. Is there anything about the company's aluminum body products like this?