First of all, according to your needs, the difference is whether it is used in households or professional use. Generally, the difference between professional power tools and general household power tools is mainly in power. Professional power tools have more power, and general household tools have more power. Small input power

The compact size and highly integrated power tools are higher in convenience than single products with large functions. Therefore, try to choose a power tool with rich functions, small size, simple structure and easy storage

When purchasing power tools, it is necessary to purchase power tools with clear packaging and no damage

The optional power tool has a normal appearance, complete plastic parts, no obvious shadows and dents, no scratches or bumps, the related paint is smooth and beautiful, and there is no defect, the surface of the machine is free of oil and stains, the handle of the switch is flat, wire and cable The length is generally not less than 2M

The relevant signs of power tools are clear and complete, and the parameters, manufacturers, certifications, etc. are available

Hold the tool in hand, turn on the power, operate the switch frequently to make the tool start frequently, observe whether the on-off function of the tool switch is reliable, whether it affects the on-site TV/fluorescent lamp, etc., so as to judge whether the tool is equipped with anti-interference suppressor

Run the power tool for 1 minute after power on, feel the vibration and observe the commutation spark, whether the air inlet is normal

Select power tools with noise within the allowable range

Choose power tools that are easy to repair and obtain

Choose the power tool and pay attention to the power supply voltage. Generally, handheld power tools need to provide 22V mains power as an energy drive. Do not connect 380V industrial power, otherwise it will cause damage to the machine.