561-03101 WIC3-0-9-PA66-YE Snap On Cable Marker, Pre-printed 0 → 9 Yellow 4.3 → 5.3mm Dia.. WIC markers are applied to the wire by simply clicking them on using the WIC tool or if no tool is available they can easily be applied by hand. Simply insert the marker strip into the back of the tool and slide down to the end and simply press the marker down over the wire.