A screwdriver is a tool used to turn a screw to force it into place, usually with a thin, wedge-shaped head that can be inserted into a slot or notch in a screw head - Beijing-Tianjin-Hebei-Shandong-Henan-Henan and Shaanxi-Shaanxi dialects are called " Screwdriver ", Jiangxi, Anhui, and Hubei, Shaanxi Guanzhong called" screwdriver ", the central and western regions called" change knife ", the Yangtze River Delta region called" screw chisel. " The main word (negative sign) and cross (positive sign) two. Common hexagonal screwdrivers, including hexagonal and hexagonal two.
