The Precise Impactor is a tool to evaluate traumatic brain injury mechanisms in basic medical research. This system is a popular way to model traumatic brain injury, controlled by pneumatic and electric devices with increased accuracy and reproducibility. In addition, a unique sensor is used to automatically detect the zero-interface reference point at the impact point of the model accurately and reliably before the start of the impact procedure, thus reducing the tedious process of manual zeroing and assists in making precise and highly repeatable brain injury modeling. 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.