Hand tools（2）

Hand tools（2）

A screwdriver is a tool used to turn a screw to force it into place. It usually has a thin wedge-shaped head that can be inserted into the slot or recess of the screw head-also known as a "screwdriver".

A wrench is a hand tool that uses the principle of leverage to turn bolts, screws, nuts, and other threads to hold the openings or sleeves of bolts or nuts. Wrenches are usually made with clamps on one or both ends of the handle to apply external force to the handle to apply external force to turn the bolt or nut to hold the opening or sleeve of the bolt or nut. When in use, an external force is applied to the shank along the thread rotation direction, and the bolt or nut can be turned.

A hammer is a tool that strikes an object to move or deform it. It is most commonly used to knock nails, correct or break objects. Hammers come in various forms, the common form is a handle and top. The top side is flat for striking, and the other side is the hammer head. The shape of the hammer head can be like a horn or a wedge, and its function is to pull out a nail. There is also a round head-shaped hammer head.

The test pencil is an electrician tool used to test whether there is electricity in the wire. There is a neon bulb in the pen body. If the neon bulb glows during the test, it indicates that the wire has electricity or is a live wire of the passage. The tip and tail of the test pencil are made of metal materials, and the barrel is made of insulating materials. When using the test pen, be sure to touch the metal part of the end of the test pen with your hand, otherwise, because the charged body, the test pen, the human body and the earth do not form a loop, the neon bulb in the test pen will not emit light, causing a misjudgment, and the charged body Uncharged.

Tape measure is a commonly used tool in daily life. What you often see is the steel tape measure, which is commonly used in construction and decoration, and is also one of the essential tools for the family. Divided into fiber tape measure, tape measure, waist measurement and so on. Luban ruler, Feng Shui ruler, and Wen Gong ruler are also steel tape measures.