A variable-frequency electric screwdriver is a power tool designed to adjust torque and speed settings to match different fastening requirements. By varying the frequency, users can control the tool’s power output, making it suitable for a wide range of tasks, from precision electronics assembly to heavy-duty fastening. This versatility improves efficiency and reduces the risk of over-tightening or damaging screws and materials. Commonly used in manufacturing, electronics, and automotive applications, it offers precision, ease of use, and adaptability to different screw sizes and materials.