1. High safety: this model of open type knife switch has good safety performance, which can effectively prevent the occurrence of electric shock accident. 2. Reliable: As the knife switch adopts mechanical structure, the switch action is reliable and not easy to fail or misoperation. 3. Convenient maintenance: the structure of the open type knife switch is simple, easy to disassemble and maintenance; at the same time, its internal components are relatively few, easy to replace the damaged parts. 4. Economical and practical: compared with other types of switches, such as contactors, etc., open-type knife switch is more affordable, and longer service life. 5. Energy efficient: open type knife switch is usually used to control circuit breaker and motor start, can realize the function of quickly cut off the power supply and turn on the current, so as to improve the efficiency of electricity and reduce energy waste.