Which of the following precautions is correct when holding a power tool?

Hand-held power tool is a common tool used for cutting, grinding and drilling. When using hand-held power tools, pay attention to safety matters to avoid accidents. Installing leakage protector is a very important safety measure. Leakage protector is an electrical protection device, which can automatically cut off the power supply when the current leaks to avoid electric shock accidents. When using hand-held power tools, high-risk factors such as current and voltage are involved, and the role of leakage protector is very important.