It is a miscellaneous making. The screw entrance has not been chamfered, and the end face of the nut is also after the rough finish cutting. It is crispy. Is it a Chinese product? At the end of the phrase, there are also three marks like chalking on the side of the nut. I do not feel like to buy it again. It is better not to sell Mr. Taro. I will pollute the company name.