(1) first of all, according to their own requirements, the difference is in the home use or professional use, usually professional using the difference between average household use power tools and electric tools, mainly on the power of professional use of electric power tools is bigger, average household with smaller power, input power and small compact volume, high integration of electric tools is higher than the large size in use convenience, function of a single product. So try to choose a feature-rich, small size, simple structure, easy to receive electric tools of choose and buy electric tools, need to buy packaging case is clear, no broken electric tools of choose and buy of electric tool normal appearance, plastic parts is complete, there is no obvious shadow and dents, no scratches or knock against, the coating is smooth and beautiful do not have a defect, the machine no grease and dirt, surface smooth switch handle, wire and cable length is generally not in 2 m electric tools about the logo is clear, complete, parameters, manufacturer, certificate of approval with hand held tools, such as processing power, frequent operation switch, make the tool is frequent starting, Observe whether the on-off function of the tool switch is reliable and whether it affects the TV set/fluorescent lamp on site, so as to judge whether the tool is equipped with anti-interference suppressor.
(2) choose power tools with noise within the permissible range.
(3) choose power tools with easy maintenances and easy accessories.
(4) when selecting power tools, pay attention to the power supply voltage. Generally, hand-held power tools should be powered by 22V municipal power supply. Do not access 380V industrial power supply, otherwise it will cause damage to the machine.

2, if in addition to the concrete drilling, but also in the wood and metal drilling, and drilling in the concrete of 10 mm below, you can consider the impact drill, impact drill by helical gear impact, impact force is not as good as the hammer.



3. If you often tighten or loosen screws, or drill holes in wood or iron, you can purchase a rechargeable electric screwdriver, which is the most convenient tool for both. A rechargeable screwdriver plus a screwdriver head set will do the job for you.

4, the hand drill we must know, it is suitable for drilling in the wood or iron plate, but do not expect it to drill in the concrete wall of much use, that is easy to damage the machine, a hand drill is the most economical power tools, even if it is imported, it only needs a few hundred dollars.



5, curve sawing, if your ability is very strong, can do some furniture or modelling, then the curve saw you sure to need, card suitable saw blade, wood, iron, plastic, stainless steel, and so on will soon be able to work out your ideal shape under you. You can choose various types of jigsaw, create your own style.