Ampere-metric screwdriver, has group of lamps for electric conducting cable connected at one end to bar, and connected at other end to ammeter, where ammeter is installed on handle of screwdriver

摘要

The screwdriver has a handle (1) and a bar (2), and a group of lamps for an electric conducting cable (3). The group of lamps for the electric conducting cable is connected at one end to the bar, and connected at the other end to an ammeter (4), where the ammeter is installed on the handle.