A screwdriver is one of the essential tools for every household, specifically used to tighten screws and is widely used. A screwdriver can be considered a simple tool in handicrafts, with a blade and a handle, but its invention has epoch-making significance. In the 3rd century【Read More】

The principle of a screwdriver The working principle of a screwdriver is the wheel axle principle, which means that force acts on the wheel. When the ratio of the wheel radius to the shaft radius is larger, it saves more effort, so a thicker screwdriver is more labor-saving to u【Read More】

A screwdriver is a tool used to turn a screw to force it into position, usually with a thin wedge-shaped head that can be inserted into the slot or recess of the screw head - referred to as a "screwdriver" in the Beijing Tianjin Hebei dialect, and a screwdriver in Shaanxi, Anhui,【Read More】

The small round hole at the end of the screwdriver has so many powerful functions that many people still don't know how many screwdrivers like these are available in every household, such as single letter ones and cross shaped ones. These screwdrivers also have many hidden tri【Read More】

A screwdriver is a tool used to tighten screws to force them into place. Usually, there is a thin wedge-shaped head that can be inserted into the slot or notch of the screw head - the Beijing Tianjin Hebei dialect is called a cone, and places such as Shaanxi, Anhui, Henan, Hub【Read More】