These mains tester screwdrivers contain a neon indicator in the clear plastic handle which lights up when the point of the screwdriver is touched on voltages between 220???250V and your thumb is forming an earth contact with the metal stud set into the top of the handle. The mains tester has a plastic insulating sleeve on the screwdriver blade and comes in two sizes ??? 140mm overall length (55mm blade length) and190mm overall length (100mm blade length). The 140mm tester is fitted with a metal pocket clip.

Mains Tester 2 pk 190 & 140Neon light in handle indicateswhen point touches 220-250VContains 2 testers140mm and 190mm

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