A screwdriver is a tool used to fasten and remove screws, commonly known as a screwdriver and a screwdriver. It is mainly composed of the head and handle of the screwdriver. Commonly used screwdrivers are mainly slotted screwdrivers and cross-recessed screwdrivers. The slotted screwdriver is a widely used processing tool in refrigerator maintenance operations. It consists of an insulated handle and a slotted screwdriver bit. The slotted screwdriver bit is a thin wedge-shaped head. The head of the cross recessed screwdriver is composed of two thin wedge-shaped pieces + character cross. Different types of cross recessed screwdrivers can fix and remove the corresponding fixing screws.
Slotted screwdrivers and cross-recessed screwdrivers are limited by the size of the cutter head when they are used. Many different types of screwdrivers are required, and they need to be turned into the tool.
At present, there are multi-functional electric screwdrivers on the market. The electric screwdriver changes the handle of the screwdriver to a handle with a power supply, and is equipped with a control button, which can control the clockwise and counterclockwise rotation of the screw, so that the operation of screw tightening and loosening can be easily realized. The head of the screwdriver can be replaced at will, so that the screwdriver can meet the needs of different working environments.
In maintenance operations, a wrench is a tool used to tighten and remove screws or nuts. The commonly used wrenches are mainly two types: adjustable wrench and fixed wrench. During maintenance, if you are unfamiliar with the environment, you cannot use a wrench without insulation for live operation. Because the metal body of the wrench itself is highly conductive, it may cause electric shock to the staff.
The two ends of the plum ratchet wrench usually have a working end with an annular hexagonal hole or a dodecagonal hole, which is suitable for occasions with narrow working spaces and is more sensitive to use. The working end of the torx ratchet wrench cannot be changed, so it is necessary to configure a complete set of the torx ratchet wrench in use. The more advanced electric Torx ratchet wrench is similar in shape to the Torx ratchet wrench. It controls the rotation of the dodecagonal hole through a special control switch to automatically tighten or remove the nut.