The metal bone needle is a kind of common sewing tool. Because of long-term use or improper storage, its surface may be contaminated by dust, stain or oxidation, which will affect its using effect and sanitary condition. In order to better protect the metal needles and extend their service life, it

This product uses the elastic ring mechanical pressure drive blood, block the limb artery blood flow, elastic ring rolling at the same time, drive the elastic cover on the limb