Profile: Shallco, Inc. is a manufacturer of rotary switches. We are an ISO 9001 certified company. Our brands include Duty Safe Breaker™. Our products include custom switches, mechanical assemblies, lock out relays, power switches, polarity reversing switches, subminiature switches, open frame rotary switches, and audio attenuators. Our snap-action switches comprise assemblies of electrically insulated stators and rotors as an integral assembly with a drive mechanism that indexes the rotors in 90 degree increments.