Twist-Lock NEMA L6-20 User Attachable Connector- Easy to install (easy to follow instructions) Isolated see-thru wiring chambers, prevents arcing & flashover, guarantees a good connection Perfect for making new power cables, or repairing extension cords Body made of heavy duty Polycarbonate and nylon material, pins made of solid brass (not folded brass like cheaper versions) Adjustable rear cord clamp for varying wires sizes (accepts 18-12 AWG) UL-C-UL Approved ROHS Compliant Twist-Lock NEMA L6-20R Replacement Connector Easy Assembly - Durable Nylon Construction - WBL620R - Rewireable NEMA L6-20R Rewirable Connector, User Attachable, Replacement Connector, Grounded 3 Wire, 20 AMP 250 Volt, WBL620R Black & White, with Speed Screws & Easy Wiring Assembly - Made of Durable Nylon Material - Commercial & Industrial Grade UL-C-UL Approved ROHS Compliant