Flex Bit Kit Klein Tools 53721 For work on up to 9/16-Inch (14 mm) O.D. wire Flexible drill bit (Cat. No. 53718) made of spring steel for extreme flexibility The screw point drill tip helps pull wire through the material as you drill Placement tool (Cat. No. 53715) folds up for easy storage Wire mesh pulling grip (Cat. No. KPS050) grabs onto the wire to help pull 1/2-Inch to 9/16-Inch O.D (outer diameter) wire and cable through