How to choose power tools

When selecting power tools, pay attention to the power supply voltage used. Generally, hand-held power tools need to provide 22V city power as the energy drive. Do not connect to 380V industrial power, otherwise it will cause damage to the machine. Tips for purchasing power tools 1. If you often drill holes on concrete walls, 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 it has a hammering frequency of 1,000 to 3,000 per minute, which can generate significant force, making it easy for you to drill holes in the concrete wall.