Voltage tester up to 250V. Handle: clear transparent plastic handle. Light model with cylindrical handle and clip. Blade: high quality steel, chrome plated, plastic protection up to the tip. Phosphated tip. According to DIN VDE 0680/6 GS marked. To test the voltage, press the screwdriver blade finished test electrode on the circuit, and one finger on the electrode applied to the end of the plastic handle (mass). If there is voltage the built-in light in the handle will light up