To test a circuit, place the screwdriver tip on the electric contact and press your thumb against the metal contact next to the neon viewing window; if the contact is live the bulb will light.
IMPORTANT: Check that the neon bulb is in order by using the tester first on a known live circuit.
Never touch the un-insulated part of the blade when testing.
£3.95 delivery charge on all 'Tool' orders. Please allow 3 - 5 working days for delivery.
Please see our Delivery section for more information.