Cablematic Tools. Designed to efficiently & precisely flare the outer conductor end on 50 ohm Annular Flexible. Models available for cable diameters of ½″, ⅞″, 1 ¼″ or 1 ⅝″ (12.7 mm, 22.2 mm, 31.75 mm or 41.28 mm) Foam Core Cable. Large plastic screwdriver-type handle provides exact leverage while rotating the tool.