Deli 4x190mm Large Test Pen Screwdriver

This is a test screwdriver used to detect electrical current in an electrical outlet or connecting wire.

When the metal tip of the screwdriver is inserted into one of the outlet's terminals or touches a wire, while placing a finger on the back of the screwdriver, the light illuminates, indicating the presence of electrical current. If it does not illuminate, it means there is no electrical current.

Technical Specifications