Impact-Resistant Thermoplastic Cover and Body * Patented Lockout Feature for Added Safety Prevents RESET if GFCI is not Operating Properly * Silver Alloy Contacts * Shutter Mechanism Inside the Receptacle Blocks Access to the Contacts Unless a Two Prong Plug is Inserted, Helping Ensure Hairpins, Keys, Etc., will be Locked Out * Heavy-Duty Construction Offers Long, Trouble-Free Service Life