Solid brass plug blades are firmly embedded in body. Terminal screw clamps are designed to contain wire and prevent binding. Terminal screws backed out, ready for wiring. Terminals in individual chambers to positively insulate conductors. Vinyl angle plugs have eight possible positions for maximum convenience. Nylon Kwiklok features patented twist-actuated internal cord clamp, reduces installation time. Meets all UL 498 requirements. 20 amp, 250 volt. .25" - .655" cord diameter. NEMA 6-20. Yellow color.