The 68099II Precise Impactor is an instrument used for traumatic brain injury and spinal cord injury models. The system adopts pneumatic-electric control, which can precisely adjust the speed, depth, and dwell time to achieve precise impact. Touch screen design, convenient and friendly operation. The zero method uses a sensor contact mechanism to automatically detect the zero interface, which is sensitive and efficient. The standard cylindrical head hammers with different sizes are available. The parameters such as impact depth, velocity, and dwell time can be precisely controlled to ensure that the damage level is correct. It is an accurate tool with high efficiency, repeatability, and stability, ensuring reproducibility of the damage model.