Excuse me, what handle screw is insulated? How many volts can it withstand?
The main word (minus) and cross (plus two). There are also commonly used six corner screwdriver, including six corners and six corners outside two.
A screwdriver is a rotating screws to force the tools in place to twist, usually with a thin wedge head, the screw head can be inserted into the slot or recess -- Beijing Tianjin Hebei Lujin Henan and Shaanxi dialect called "screwdriver", Anhui, and Hubei, known as the "driver", the Midwest the area known as "the knife", the Yangtze River Delta region known as the "screwdriver".
Screwdrivers are generally insulated, and 220 and 380 are absolutely ok.
