The advanced design of LENCO cable connectors offers many advantages over older styles. Metal parts are precision machined from heavy, specially shaped brass extrusion. Cam action design of male half connector pulls the two halves tightly together. Connector covers are molded from a special heat and cold resistant material. Covers have no metal liner to rust or corrode. Easily installed with a 1/4 inch (6.35 mm) Allen wrench.