Commercial Grade - Thermoplastic Rubber Plugs 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. Combination slot/Phillips head mounting and terminal screws ease installation with power screwdrivers (Slot/Robertson screws in Canada where available).DESIGN FEATURES:• Solid brass plug blades are firmly embedded in body• Thermoplastic rubber plugs & connectors maintain flexibility in extremely low temperatures• Terminals in individual chambers to positively insulate conductors• Terminal screw clamps are designed to contain wire and prevent binding• Terminal screws backed out and ready for wiring• Combination Slot/Phillips-head mounting and terminal screws for installation flexibility (Slot/ Robertson screws in Canada where available)