With the continuous advancement of technology, more and more power tools have emerged to improve work efficiency and replace heavy physical work. It is no exaggeration to say that the appearance of power tools has changed the face of the world. A tool is an appliance that confers a mechanical advantage on humans. There are many birds and primates in the animal world that also use tools, but there is one thing that sets us apart from them, and that is power. Unlike other animals in the animal kingdom, we humans do not only rely on physical strength, but can use other energy sources to drive tools.

　　We may not have superpowers, but we have power tools. Power tools cover all aspects of our lives in medical treatment, manufacturing, construction, rescue and so on. During the industrial revolution in the 19th century, factories used gas, steam and electricity to give tools more power. Since the 1960s, people have transformed power tools again to enable them to be used in ordinary households. The global market share of power tools is 23.4 billion US dollars. About 40% of them come from North America, 22% from Asia, and 27% from Europe, with power tools accounting for about 75% of all power tools sold.

　　The power of a power tool depends on how much voltage it can withstand. You can think of voltage as water pressure. The greater the pressure of water management, the stronger the jet of water. The same goes for voltage, the more volts there are in a tool, the greater the amount of power the tool can produce. Getting enough voltage also meant being plugged in, but the discovery of the battery changed all that. Battery-powered tools were first used on the moon, in the 1960s. The Apollo astronauts needed a small handheld power drill to drill into the lunar surface to collect soil samples, so engineers designed a special power tool battery pack. From then on, the cordless drill was born. This unique invention was first applied to the handheld cordless vacuum cleaner launched in 1979. Then sparked a revolution in household power tools.

　　The power tools we know and use run on human energy, electricity, gasoline and compressed air, but the tools used by professionals are more powerful. In some car racing scenes, we often see racing car maintenance personnel use pneumatic wrench to remove tires, because the race has a time limit and they must race against time to save time. It only takes 12 seconds for maintenance personnel to remove the nuts of the four tires, because the speed of this thunderbolt wrench can reach 25,000 revolutions in one minute. It is powered by compressed air, compared to a standard pneumatic wrench at 2,000 rpm. The speed of the thunder gun is 12.5 times that of them. At this speed to remove the nut of the tire, a nut can be removed within 0.2 seconds. If using a standard air wrench. Instead of the thunder gun, the 12 seconds of changing the tire will become three minutes.

　　There is a legendary story in the 19th century, in which the protagonist named John Henry was a worker who built a railway. This worker was the strongest worker at that time. His job was to drive nails into the rails. He, and then a power tool was born, and the appearance of the air hammer made it no longer necessary to use brute force to drive nails. The worker challenged the jackhammer fearlessly, and the man-machine battle began. Who can thrash faster? In the end, the human Henry won. But due to his excessive physical strength, he died not long after. Of course, this is just a legend. In this day and age, even the commonly used hammer and nail cannot escape the obsolescence of human progress.

　　The emergence of a new power tool nail gun, which is at least ten times faster than a hammer, can shoot 100 nails per minute, far exceeding the efficiency of human power. There is also our most common chainsaw, which uses a two-stroke starter motor. It is small but has a powerful motor that can drive equipment such as lawn mowers and motorcycles. When using a chainsaw, the operator only needs to pull the rope to activate the starter, which drives the steel teeth on the saw chain to cut through the wood. The advent of these power tools revolutionized the construction industry.

　　Of course, in addition to being used for manufacturing, electric tools can also be used to save lives. Electric tools can also achieve surgical precision. In the past, surgeons switched from major excision to minimally invasive surgery. In order to realize this Technical support is required. And technology often means the need for power tools. We all know that surgeons will use scalpel blades to make incisions. The problem is that such incisions will bleed. Now there is a power tool for surgery. Its needle tip is heated, and it uses heat like a scalpel to cut and coagulate wounds. Coagulation means hemostasis, which is very important to surgeons. It is driven by human beings to turn materials into endless high-tech equipment and inject real power into power tools.