Features and advantages of the safe retraction syringe: Like ordinary syringes, it is operated with one hand and is disposable; medical personnel do not need additional steps to complete the injection; the needle retracts automatically. Immediately after drug injection, the needle tube automatically realizes the retraction function, and the needle tube is firmly locked inside the core rod; low residue; the diameter of the needle tube can be easily identified according to the color of the needle seat, and the colors of all needle seats conform to ISO standards; needle sharpness. The use of steel tubes combined with new grinding technology makes the beveled surface of the needle more precise.