The 440K-C21097 is a Guard Master Safety Clip that is designed to provide compliance with Functional Safety International Standard. This safety clip is a fail-safe rotary disconnect switch that latches in the "off" position until released with a key. It is designed to provide an additional layer of safety for personnel who work in hazardous environments. The clip is connected to a cable that is connected to an emergency stop push button. This switch is typically used in machine guards to prevent personnel from accessing hazardous areas.