Super Tough Nylon Body Resists Damage From Severe Impact, Abrasion and Chemicals | NEMA and Non-NEMA Configurations Available | Solid Brass Blades And Contacts Feature Improved Conductivity, Low Resistance, Low Heat, and Long Life | Internal Wiring Chambers Isolate Individual Conductors to Prevent Flashover, Arcing, and Stray Strands of Wire | Deep slotted triple drive face module and cord clamp screws