What are the characteristics of the structure of acupuncture needles

There are many types of acupuncture needles, and milliform needles are one of them, but what are the structural characteristics of this needle? If you want to know, take a look at the source of the manufacturer is how to introduce it.
The needle handle and the needle tail are often wound with copper or silver wire, in a spiral or cylinder shape, and the shape of the needle handle has a ring handle, a flower handle, a flat handle, a tube handle, and so on. The main function of the needle handle is to facilitate the effort and facilitate the operation of the needle. Among them, the flower handle is also called the coiling dragon needle, which is thicker and often used for fire needles, which is conducive to heat dissipation and is not hot when used.
The tip of the needle should be correct and not bias, round but not blunt, hairless hook, high finish, round in the tip, shaped like "pine needle", so that the needle resistance is small and not easy to blunt; The needle body should be smooth and straight, round and uniform, tough and elastic; Needle root should be firm, no erosion, scars.