It is not illegal or criminal to buy and sell these screw reamers (punches).

Screw reamers (punches) are just ordinary industrial tools and are not regulatory instruments. Of course, it is illegal to buy and sell these spiral reamers without a business license, product origin is unknown, fake, etc., but that is another concept.

Reamer refers to a rotating tool with one or more teeth, used to remove a thin layer of metal on the surface of a processed hole. A rotating finishing tool with a straight or spiral edge, used for hole expansion or drilling. Repair holes.

A provisional regulation on the control of some knives issued by our country in 1983 pointed out that units producing controlled knives must obtain a "Special Tool Production License" before they can produce. Stores that sell controlled knives must apply for a "Special Tool Purchase Certificate" as proof of purchase.