Square D Homeline miniature GFCI (ground fault circuit interrupter) circuit breaker. In a 1-inch wide format for 1-pole circuit breakers. They are designed to plug into Homeline load centers. Provides overload and short circuit protection, combined with Class A ground fault protection. UL (Underwriters Laboratories) listed. This product can expose you to chemicals which are known to the State of California to cause Carcinogen & Reproductive harm. For more information go to www.p65warnings.ca.gov -