Microprocessor electronics with soft start, restart lock after power failure, and overload protection. The motor has a high load capacity with high efficiency for strong performance. Effective airflow and optimized carbon geometry ensure a long lifespan. The motor and gearbox feature an elaborate dust seal. A backstop mechanism shuts off the motor when the disc is blocked. The tool is extremely lightweight and easy to handle, with a compact, slim, and ergonomic design. It promotes an ergonomic arm position through the angled side handle. The protective cover is tool-free adjustable and features a lockable sliding switch, spindle lock, and an additional handle.