Cut through sheathing limited to .031" (.787mm) or .018" (.457mm). This tool is most practically suited for the customary inside type 3/16'' (4.7mm), 1/4" (6.4mm), 3/8" (9.5mm) or 1/2" (12.7mm) cables, but will handle thin sheathed cable up to 1" (2.5cm) in diameter.