When sewing, many people carry a round circle on their hands. In the northeast, everyone calls her thimble. What he means is that when you are sewing, sometimes the needle is in the process of sewing clothes, and sometimes the material of clothes is thick and the thread is difficult to remove. So use external force to penetrate it, to penetrate the horse line, and then sew what you are sewing. It is accepted that there are many small pits on the periphery. His pit is to put the genuine part on the back of the needle tip in the pit, so as not to make it stable, stable and happy, and it can be used directly.