The Faithfull Mains Tester Screwdriver is a voltage testing tool designed for electricians and tradespeople working with AC electrical circuits. Fitted with a neon indicator in the clear plastic handle, this mains tester provides visual confirmation when the point of the tester contacts a live voltage source, making it an essential item for electrical diagnostic work. Suitable for testing AC voltages from 125 to 250 volts against earth, this voltage tester operates through a simple two-point contact method. The tip of the tester is placed on the suspected live source while finger contact is applied to the metal stud on the top of the handle. When the circuit or terminal contact point is live, the neon bulb illuminates to confirm the presence of voltage. The compact 140mm overall length makes this mains tester screwdriver ideal for use in confined spaces such as consumer units, junction boxes and socket outlets. The 2.9mm tip size is compatible with standard screw terminals commonly found in UK electrical installations. It is essential to test the mains tester on a known live source before each use to confirm the indicator bulb is functioning correctly. Users should be aware that the earthing position largely determines whether the tester bulb will illuminate, so failure to illuminate does not provide absolute confirmation that no voltage is present. Features and Benefits: • Clear plastic handle allows easy viewing of neon indicator • Compatible with standard 125-250V AC voltage ranges • Compact 140mm length for working in restricted spaces • Metal contact stud provides reliable earth connection point Specifications: Tip Size (mm): 2.9 Overall Length (mm): 140