(1) First of all, according to your own needs, the difference is whether it is for home use or professional use. Usually, the difference between professional electric tools and general household electric tools is mainly in power. Professional electric tools have higher power, and general household electric tools The power of the tool is small, and the input power is also small. The compact size, highly integrated power tools are more convenient to use than the products with large volume and single function. Therefore, try to choose power tools with rich functions, small size, simple structure, and easy storage. When purchasing power tools, you need to buy power tools with clear packaging and no damage. Obvious shadows and dents, no scratches or bump marks, the relevant paint is smooth and beautiful without defects, the surface of the whole machine is free of oil and stains, the handle of the switch is flat, and the length of wires and cables is generally not less than 2M. The relevant signs of electric tools are clear and complete , parameters, manufacturers, certificates, etc. are all equipped with hand-held tools, connected to the power supply, and frequently operated switches to make the tools start frequently. Observe whether the on-off function of the tool switch is reliable, and whether it affects the TV/fluorescent lamps on site, etc., so that Judging whether the tool is equipped with an anti-interference suppressor, the power tool is powered on and run for 1 minute, feel the vibration and observe the reversing sparks, whether the air inlet is normal.

　　(2) Select an electric tool with noise within the allowable range.

　　(3) Choose power tools that are easy to maintain and easy to get accessories.

　　(4) Pay attention to the power supply voltage used when selecting electric tools. Generally, hand-held electric tools need to provide 22V mains power as the energy drive, and do not connect to 380V industrial power, otherwise the machine will be damaged.

　　Power tool selection skills

　　1. If you often drill holes in concrete walls, then a two-kilogram electric hammer is your best choice. Due to the cylinder structure of the electric hammer, the hammering force is very high, and with a frequency of 1,000 to 3,000 hammerings per minute, it can generate significant force, making it easy for you to drill holes in concrete walls. Coupled with an adapter rod and the chuck of an ordinary electric drill, it can also complete the function of a hand electric drill, achieving the purpose of one machine with multiple functions. It is a speed-adjusting electric hammer + adapter rod + 13mm electric drill chuck. It only costs a few hundred yuan, and with a few commonly used drill bits, then most of the decoration tasks in your home can be completed by yourself.

　　2. If in addition to concrete drilling, it is also necessary to take into account the drilling of wood and metal, and the drilling on the concrete is less than 10 mm, you can consider the impact drill. The impact drill relies on the helical gear to produce impact, and the impact force is not as good as the electric hammer.

　　3. If you often tighten or loosen screws, or punch holes in wood or iron, then you can buy a rechargeable electric screwdriver, which is the most convenient tool in these two aspects. A cordless electric driver plus a set of bits for the job at hand.

　　4. Everyone must know that the electric hand drill is suitable for drilling holes on wooden or iron plates, but don’t expect it to do much for drilling holes on concrete walls. Doing so can easily damage the machine. A hand electric drill is the most economical Advanced electric tools, even if imported, only cost a few hundred yuan.

　　5. Curve saw, if you have a strong hands-on ability and can make some furniture or shapes by yourself, then you must need a curve saw, install the appropriate saw blade on the card, wood, iron, plastic, stainless steel, etc. will soon be able to Process your ideal shape under your hands. You can choose various types of jig saws to create your own shape.