The Use Principle of Screwdriver

The screwdriver is a tool that is used to twist the screw to force it in place, usually with a thin wedge, with a minus sign and a positive sign. There is a common hex screwdriver, including hexagonal screwdriver.
The screwdriver is used to pry the paint cover, which used the working principle of the lever. The greater the distance from the power point to the fulcrum more effort, so long screwdriver is more effort than the short screwdriver.
When the screwdriver is used to screw the screw, it use the axle of the working principle. When the wheel is bigger and more labor-intensive, so the use of coarse screwdriver is more effort than the use of fine screwdriver.

The Three Wonders of The Screwdriver

The little skill in life exists in people's whimsy, like a small screwdriver, it must not only be invented by twisting screws. Screwdriver is steel as raw material, because of the high hardness of the material, many people apply this feature to the basic necessities of life.
1.Remove the tires stones.
Many car users is helpless for the small stone in the tire, when the vehicle driving a certain mileage, the small stone will "accumulate" in the tires. Remove out of the small stone with a screwdriver, can effectively prevent the occurrence of puncture.
2.The screwdriver isolates the object
Screwdrivers will play the role of supporting objects in the life, such as the screwdriver placed in the loose faucet and the toilet, the faucet can be fixed.

How to Buy A Screwdriver?

The family will often use a small screwdriver, we should understand how to buy,  and buy a high durability of the screwdriver is also a knowledge.
We need to pay attention to the effective working length of the screwdriver, a screwdriver is a tool that uses the physical characteristics of the axle, when the wheel is larger, the smaller the required torque is. So most of the screwdriver handle will be much thicker than the screwdriver head. If you choose the product pole length is too small, screwdriver when the screwdriver will be very laborious.
Second, pay attention to screwdriver material, screwdriver steel is the main raw material of the goods, we can query the relevant hardness data, then comparing our own needs, to determine the screwdriver steel hardness and model.
Finally choose a combination of screwdriver set. Ordinary screwdriver can only meet some of the needs of life, the shape of the head is relatively simple, if life encountered more special screws, it can not play a role. Combined screwdriver can adapt to a variety of unexpected situations in life, and even to meet some special needs.

Several Common Hand Tools

First of all introduce the wrench, wrench is a common tool for installation and removal, in the course of using the lever principle, which will fix bolts and nuts. One end or both ends of the wrench will have an external force, so that the bolt and nut can be fixed.
Another common tool in hand tools is pliers, it is used to grip and hold the machined items, and they can also be used to twist, bend, and cut the wire.
The hammer has the most powerful function in hand tools, it can be used not only for tinkering, but also can be used to deal with some food, such as walnut. The biggest feature of the hammer is to be strong, because it is used to beat the object.
A screwdriver is generally a tool used to twist a screw, usually it has a thin wedge-shaped head, can be inserted into the screw head slot or notch. Common are the word screwdriver and Phillips screwdriver.
Hand tools include a variety of tools, home life commonly used wrenches, pliers, hammers, tape measure and screwdriver.