Underground- Semi-Con Scoring 1800SS Adjustable Blade Series Cable O.D. 1-3/4″ to 3″. The 1800 Series Semi-Con Scorers have adjustable blade depth (.001″ – .100″) for scoring (scribing) the semi-conductive shield of medium voltage cable so the semi-con can be removed without nicking or damaging the cable insulation. The tool switches between the square and spiral cutting functions without removing it from the cable.