Features:Safe and hygienic, replace disposable blood collection needles to prevent cross-infection.The pain is slight, and the depth of penetration can be adjusted.Simple operation, just one click.Professional and excellent for cupping therapy.Soft touch and painless one to perform bleeding.Easy control, it fit for all kinds of sterile blood lancet.The lancet device assist diabetes patients to take out blood to monitor their glucose levels.Easy to clean, safety. Needling procedure1. Pick up a needle using a magnet attached to the piston and, without touching the cutting edge of the needle, put it into the injector;2. Set the depth of needle advance using the adjusting screws;3. By keeping the piston with the index finger in an elevated position, place the injectorhead so that it is located against a correspondence point;4. Release the head by letting it drop under the force of gravity. In this doing, the needle will hit the correspondence point. Specification:100% Brand and NewSize:As pictures show(1 inch = 2.54cm)Color:GoldMaterials:pure copper Packing Included:1pcs Blood Lancing Pen Note:Transition: 1cm=10mm=0.39inchPlease allow 1-3mm error due to manual measurement. pls make sure you do not mind before you bid.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!