Handheld electric tools refer to portable electric tools that can be operated directly by hand without the need for other auxiliary devices. These types of tools are usually small and lightweight, suitable for various manual operation scenarios, and widely used in fields such as home, industry, and construction. They complete various tasks such as drilling, cutting, polishing, and shearing through built-in motors or other power components.

Handheld electric tools are usually classified into the following categories based on their safety protection performance:

Class I tools: rely on basic insulation and neutral protection to prevent electric shock, typically have a metal casing, and are suitable for dry environments.

Class II tools: rely on double insulation or reinforced insulation to prevent electric shock, do not require neutral protection, suitable for humid or water environments.

Class III tools: powered by a safe extra low voltage (usually below 50V) to ensure safe use, suitable for high-risk narrow or humid places.

Common handheld electric tools include electric drills, electric screwdrivers, electric grinding wheel cutters, electric hammers, angle grinders, etc. When using, attention should be paid to safety operating procedures, such as wearing insulated gloves, checking tool status, and avoiding overloading to ensure safety.