[Features] ● Detects metal in concrete. ●It is used for building renewal work, such as drilling holes in concrete containing rebar or metal buried pipes. ●For large core drills, it can be used even under conditions where the power supply voltage fluctuates significantly. ●It has a built-in sensor that works reliably even in the field where the voltage is unstable. ●Used for seismic reinforcement work using large core drills.