It is suitable for clinical scenarios in medical institutions such as venipuncture, infusion, blood collection, and emergency hemostasis. It can temporarily achieve hemostasis by constricting patients' limbs and help expose blood vessels to improve the success rate of puncture. It is also applicable for outdoor first aid and home emergency hemostasis (to be used under professional guidance), providing reliable support for medical procedures and emergency treatments. Featuring a buckle fastening design, the tightening force can be flexibly adjusted to fit limbs of varying thicknesses. Once secured, the buckle will not loosen or slip easily, ensuring stability throughout medical operations.