Bone cement is injected into back bones (vertebrae) that have cracked or broken, often because of osteoporosis. The cement hardens, stabilizing the fractures and supporting your spine. Bone cement is cured on polymerization process after injection and stabilises fractured vertebrae, increases mechanical strength, provides relief in pain and improves life comfort.Strong pressure resistance The strength of the aluminum alloy of the screw rod and thread structure is much higher than that of plastic. Dual sealing ring design provides much better sealing property and stable pressure conduction. Easier operation One Key switching between the two propelling methods (spiral type& plug type)provides easy operation. Detachable head design enables convenient bone cement injection. More ergonomical Ergonomical design provides comfortable feeling. Gun type handle ensures more stable handling which can effectively counter rotation, so that it provides more stable and much safer injection. Precise control of bone cement injection 20ml maximum volume of the sleeve. 1 circle(360°) rotation of the spiral rod contributes to 0.5ml injection of bone cement.