Connection bars with 12 elements, separable by hand, made from black fireproofed polypropylene. Fitted with captive screws. Unlike the "domino", wires are introduced from only one side. A wire guide with a chamfered input allows for precise guidance. These bars can be used for both flexible and rigid wires. Delivered unscrewed. The 16 mm2 version is fitted with a combination head screw to take both flat and crosshead screwdrivers.