HEAVY DUTY - Industrial grade performance and durability. High impact and heat resistant nylon body provides maximum safety and long service life. One-piece, high-grade brass contacts offer excellent conductivity and heat-rise resistance. NEVER LOSE - Secure locking design that receptacle is locking tightly on electrical equipment to keep it from vibrating loose and falling out. The assembly locks together to make the most abuse resistant receptacle ever. GENERATOR-FRIENDLY - Easy and reliable installation for stranded and solid wire. Re-designed to provide split circuit capability in the field. Perfect for generators of all brands. Suitable for homeowners all the way up to professional contractors. EASY INSTALLATION - Face and body feature alignment make it easy to assemble. Grip screws are installed from the same side to make tightening easy. Pocketed recess for cord grip screws deters the slippage of the screwdriver. UL/CUL LISTED - All our electrical devices are UL lis