Made of titanium (Ti-6AI-4V ELI, ASTM F136-98) and designed in a way of lowering the height of the screw part as much as possible to minimize the feeling of foreign substance inside the body the patients might feel after the operation. AEGISII/Mono provides both the standard type and the guided type, so one of them can be chosen for an operation, by taking into account the condition of a patient. The surface is anodized, making it easier to identify the product. Also the lead part of screw is designed to provide the self-tapping function, allowing an operation to be performed without any additional tapping device. The guided type can allow the guide part to be removed easily while minimizing the sharpness at the part where the removal occurs.