For “ring” cutting the sheathing of inside type plastic, fabric or rubber covered cable.

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.