The movable clamp ensures fixation at the puncture site regardless of the depth of the catheter, minimizing trauma and irritation at the puncture site. Marking the depth helps to accurately establish the central venous catheter from the right or left subclavian or jugular vein. The soft end reduces vascular trauma, minimizing vascular erosion, hemothorax, and cardiac tamponade. One-, two-, and three-channel options are available. X-ray contrast makes it easier to confirm the catheter installation. The endpoints of the multi-space version are more X-ray contrast, allowing for easy confirmation of the X-ray scanning installation. The set consists of: Central venous catheter with clamp 5 ml syringe for injections, Y cap needle Nitinol conductor with a propulsor Vasodilator Injection needle Heparin cap 2pcs. Fixation Scalpel 3 running crane Fixing bandage